GOSSIP-86 Examples in separate module - Added Readme.
This commit is contained in:
Terry Weymouth
@ -4,6 +4,10 @@ Gossip protocol is a method for a group of nodes to discover and check the livel
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The original implementation was forked from https://code.google.com/p/java-gossip/. Several bug fixes and changes have already been added.
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A set of easily-run examples, illustrating various features of Gossip, are available in the gossip-examples module. The README.md file, in that module described how to run those examples.
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Below, a list of code snippits which show how to incorproate Apache Gossip into your project.
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Usage
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-----
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2
gossip-examples/.gitignore
vendored
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2
gossip-examples/.gitignore
vendored
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@ -0,0 +1,2 @@
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# Generated by running examples
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*.mycluster.*.json
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246
gossip-examples/README.md
Normal file
246
gossip-examples/README.md
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@ -0,0 +1,246 @@
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Running the Examples
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===================================================
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Apache Gossip is designed to run as library used by others. That is, it in intended as a feature to be embedded in other code.
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These examples illustrate some simple cases of the invocation of Gossip from an "thin" application layer, to illustrate various
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features of the library.
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For additional information see:
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* This [YouTube video](https://www.youtube.com/watch?v=bZXZrp7yBkw&t=39s) illustrating and illuminating the first example.
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* This [YouTube video](https://www.youtube.com/watch?v=SqkJs0QDRdk) illustrating and illuminating the second example.
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* A [general description of the Gossip Protocol](https://en.wikipedia.org/wiki/Gossip_protocol)
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Initial setup - Preconditions
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-----------------------------
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These instructions assume that you are using a Unix-like command line interface; translate as necessary.
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Prior to running these examples you will need to have your environment set up to run java and Maven
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commands:
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* install java 8 - [https://java.com/](https://java.com/), and
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* install Maven - [https://maven.apache.org/install.html](https://maven.apache.org/install.html)
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Then, you will need a local copy of the code. The simplest is to download the project to a local folder:
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* browse to [https://github.com/apache/incubator-gossip](https://github.com/apache/incubator-gossip)
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* click on the "Clone of Download" button
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* click on the "Download ZIP" option
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* unzip the file to in a convenient location
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In what follows, we will call the resulting project folder **incubator-gossip**.
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As an alternative, you can also [clone](https://help.github.com/articles/cloning-a-repository/)
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the GitHub repository.
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Lastly, you will need to use Maven to build and install the necessary dependencies:
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```
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cd incubator-gossip
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mvn install -DskipTests
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```
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When all that is finished are you ready to start running the first example...
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Running org.apache.gossip.examples.StandAloneNode
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-------------------------------------------------
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This first example illustrates the basic, underlying, communication layer the sets up and maintains a gossip network cluster.
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In the [YouTube video](https://www.youtube.com/watch?v=bZXZrp7yBkw&t=39s) there is a description of
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the architecture and a demonstration of running of this example. While the video was created with an earlier version of the system,
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these instructions will get you going on that example.
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To run this example from the code (in a clone or download of the archive) simply change your working directory
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to the gossip-examples module and run the application in maven.
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Specifically, after cloning or downloading the repository:
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```
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cd incubator-gossip/gossip-examples
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mvn exec:java -Dexec.mainClass=org.apache.gossip.examples.StandAloneNode -Dexec.args="udp://localhost:10000 0 udp://localhost:10000 0"
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```
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This sets up a single StandAloneNode that starts out listening to itself. The arguments are:
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1. The URI (host and port) for the node - **udp://localhost:10000**
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2. The id for the node - **0**
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3. The URI for a "seed" node - **udp://localhost:10000**
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4. The id for that seed node - **0**
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Note. To stop the the example, simply kill the process (control-C, for example).
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In this application, the output uses a "terminal escape sequence" that clears the
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terminal display and resets the cursor to the upper left corner.
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if, for some reason, this is not working in your case, you can add the (optional) flag '-s' to the args in the
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command line, to suppress this "clear screen" behavior. That is:
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```
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cd incubator-gossip/gossip-examples
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mvn exec:java -Dexec.mainClass=org.apache.gossip.examples.StandAloneNode -Dexec.args="-s udp://localhost:10000 0 udp://localhost:10000 0"
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```
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Normally, you would set up nodes in a network on separate hosts, but in this case, illustrating the basic communications in gossip,
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we are just running all the nodes on the same host, localhost. The seed node will generally be one of the other nodes in the
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network: enough information for this node to (eventually) acquire the list of all nodes in its cluster.
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You will see that this gossip node prints out two list of know other nodes, live and dead. The live nodes are nodes assumed to be active and
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connected, the dead nodes are nodes that have "gone missing" long enough to be assumed dormant or disconnected. See details in the video.
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With only a single node running in this cluster, there are no other nodes detected, so both the live and dead lists are empty.
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Then, in a separate terminal window, cd to the same folder and enter the the same run command with the first two arguments
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changed to reflect the fact that this is a different node
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1. host/port for the node - **udp://localhost:10001**
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2. id for the node - **1**
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That is:
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```
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cd incubator-gossip/gossip-examples
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mvn exec:java -Dexec.mainClass=org.apache.gossip.examples.StandAloneNode -Dexec.args="udp://localhost:10001 1 udp://localhost:10000 0"
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```
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Now, because the "seed node" is the first node that we started, this second node is listening to the first node,
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and they exchange list of known nodes. And start listening to each other, so that in short order they both have a list of live notes
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with one member, the other live node in the cluster.
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Finally, in yet another terminal window, cd to the same folder and enter the the same run command with the first two arguments changed to
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1. host/port for the node - **udp://localhost:10002**
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2. id for the node - **2**
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```
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cd incubator-gossip/gossip-examples
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mvn exec:java -Dexec.mainClass=org.apache.gossip.examples.StandAloneNode -Dexec.args="udp://localhost:10002 2 udp://localhost:10000 0”
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```
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Now the lists of live nodes for the cluster converge to reflect each node's connections to the other two nodes.
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To see a node moved to the dead list. Kill the process in one of the running terminals: enter control-c in the terminal window.
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Then the live-dead list of the two remaining nodes will converge to show one node live and one node dead.
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Start the missing node again, and it will again appear in the live list.
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Note, that it does not matter which node goes dormant, every live node (eventually) communicates with some other
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live node in the cluster and gets the necessary updated status information.
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If you read the code, you will see that it defines a cluster (name = 'mycluster') and a number of other setup details. See the video for
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a more complete description of the setup and for a more details description of the interactions among the nodes.
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Also note, that the process of running these nodes produces a set of JSON files recording node state (in the 'base' directory from where the node
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running). This enables a quicker startup as failed nodes recover. In this example, to recover a node that you have killed,
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using control-c, simply re-issue the command to run the node.
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Running org.apache.gossip.examples.StandAloneNodeCrdtOrSet
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----------------------------------------------------------
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This second example illustrates the using the data layer to share structured information: a shared representation of a set
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of strings, and a shared counter. The objects representing those shared values are special cases of a Conflict-free Replicated
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Data Type (hence, CRDT).
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Here is the problem that is solved by these CRDT objects: since each node in a cluster can message any other node in the cluster
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in any order, the messages that reflect the content of data structure can arrive in any order. For example, one node may add an object
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to the set and send that modified set to another node that removes that object and sends that message to a third node. If the first node
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also sends a message to the third node (with the object in the set), the third node could receive conflicting information. But the CRDT
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data structures always contain enough information to resolve the conflict.
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As with the first demo there is a You Tube video that illustrates the problem and shows how it is resolved and illustrates the running
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example: [https://www.youtube.com/watch?v=SqkJs0QDRdk](https://www.youtube.com/watch?v=SqkJs0QDRdk) .
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Again, we will run three instances of the example, to illustrate the actions of the nodes in the cluster.
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The arguments to the application are identical to those in the
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first example. The difference in this example is that each node will read "commands" the change the local state of its information. Which we
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will illustrate shortly. But first, lets get the three nodes running:
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In the first terminal window:
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```
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cd incubator-gossip/gossip-examples
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mvn exec:java -Dexec.mainClass=org.apache.gossip.examples.StandAloneNodeCrdtOrSet -Dexec.args="udp://localhost:10000 0 udp://localhost:10000 0"
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```
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In the second terminal window:
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```
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cd incubator-gossip/gossip-examples
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mvn exec:java -Dexec.mainClass=org.apache.gossip.examples.StandAloneNodeCrdtOrSet -Dexec.args="udp://localhost:10001 1 udp://localhost:10000 0"
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```
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In the third terminal window:
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```
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cd incubator-gossip/gossip-examples
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mvn exec:java -Dexec.mainClass=org.apache.gossip.examples.StandAloneNodeCrdtOrSet -Dexec.args="udp://localhost:10002 2 udp://localhost:10000 0"
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```
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Now, at any of the terminal windows, you can type a command from the following set of commands to change the data that is stored locally.
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Note, while you are typing, the terminal output continues, forcing you to type blind, but when you hit the return, to end
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the input line, the input will be briefly displayed before scrolling off the screen.
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When you type one of these commands, you can then watch the propagation of that data through the cluster. The commands are:
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```
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a string
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r string
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g number
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```
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* **a** is the 'add' command; it adds the string to the shared set - you should see the set displayed with the new value,
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eventually, at all nodes.
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* **r** is the 'remove' command; it removes the string from the set (if it exists in the set) - you should see the
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value eventually leave the set at all nodes
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* **g** is the "global increment" command; it assume that it's argument is a number and adds that number to an accumulator.
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Eventually, the accumulator at all nodes will settle to the same value.
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The CRDT representations of these values assure that all nodes will reach the same end state for the resulting value regardless of the order
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of arrival of information from other nodes in the cluster.
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As an augmentation to the video, this [wikipedia article](https://en.wikipedia.org/wiki/Conflict-free_replicated_data_type),
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describing various CRDT representations and their usefulness, as well as some information about interesting applications.
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Running org.apache.gossip.examples.StandAloneDatacenterAndRack
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--------------------------------------------------------------
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This final example illustrates more fine grained control over the expected "responsiveness" of nodes in the cluster.
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Apache gossip is designed as a library intended to be embedded in applications which to take advantage of the gossip-protocol
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for peer-to-peer communications. The effectiveness of communications among nodes in a gossip cluster can be tuned
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to the expected latency of message transmission and expected responsiveness of other nodes in the network. This example illustrates
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one model of this type of control: a "data center and rack" model of node distribution. In this model, nodes that are in the same
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'data center' (perhaps on a different 'rack') are assumed to have very lower latency and high fidelity of communications.
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While, nodes in different data centers are assumed to require more time to communicate, and be subject to
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a higher rate of communication failure, so communications can be tuned to tolerate more variation in latency and success of
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transmission, but this result in a longer "settle" time.
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Accordingly, the application in this example has a couple of extra arguments, a data center id, and a rack id.
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To start the first node (in the first terminal window), type the following:
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```
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cd incubator-gossip/gossip-examples
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mvn exec:java -Dexec.mainClass=org.apache.gossip.examples.StandAloneDatacenterAndRack -Dexec.args="udp://localhost:10000 0 udp://localhost:10000 0 1 2"
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```
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The first four arguments are the same as in the other two examples, and the last two arguments are the new arguments:
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1. The URI (host and port) for the node - **udp://localhost:10000**
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2. The id for the node - **0**
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3. The URI for a "seed" node - **udp://localhost:10000**
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4. The id for that seed node - **0**
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5. The data center id - **1**
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6. The rack id - **2**
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Lets then, set up two additional nodes (each in a separate terminal window), one in the same data center on a different rack,
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and the other in a different data center.
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```
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cd incubator-gossip/gossip-examples
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mvn exec:java -Dexec.mainClass=org.apache.gossip.examples.StandAloneDatacenterAndRack -Dexec.args="udp://localhost:10001 1 udp://localhost:10000 0 1 3"
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```
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```
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cd incubator-gossip/gossip-examples
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mvn exec:java -Dexec.mainClass=org.apache.gossip.examples.StandAloneDatacenterAndRack -Dexec.args="udp://localhost:10002 2 udp://localhost:10000 0 2 2"
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```
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Now, the application running in the first terminal window, is identified as running in data center 1 and on rack 2;
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the application in the second terminal window is running in the same data center in a different rack (data center 1, rack 3).
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While, the application in the third terminal is running in a different data center (data center 2).
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If you stop the node in the first terminal window (control-c) you will observe that the process in the third terminal window
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takes longer to settle to the correct state then the process in the second terminal window, because it is expecting
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a greater latency in message transmission and is (therefore) more tolerant to delays (and drops) in messaging, taking it
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longer to detect that the killed process is "off line".
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Final Notes
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-----------
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That concludes the description of running the examples.
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This project is an Apache [incubator project](http://incubator.apache.org/projects/gossip.html).
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The [official web site](http://gossip.incubator.apache.org/community/) has much additional information:
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see especially 'get involved' under 'community'. Enjoy, and please let us know if you are finding this library helpful in any way.
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45
gossip-examples/pom.xml
Normal file
45
gossip-examples/pom.xml
Normal file
@ -0,0 +1,45 @@
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<?xml version="1.0" encoding="UTF-8"?>
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<!-- Licensed to the Apache Software Foundation (ASF) under one or more contributor
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license agreements. See the NOTICE file distributed with this work for additional
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information regarding copyright ownership. The ASF licenses this file to
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You under the Apache License, Version 2.0 (the "License"); you may not use
|
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this file except in compliance with the License. You may obtain a copy of
|
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the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required
|
||||
by applicable law or agreed to in writing, software distributed under the
|
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License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS
|
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OF ANY KIND, either express or implied. See the License for the specific
|
||||
language governing permissions and limitations under the License. -->
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<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<parent>
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<groupId>org.apache.gossip</groupId>
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<artifactId>gossip-parent</artifactId>
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<version>0.1.3-incubating-SNAPSHOT</version>
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</parent>
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<name>Gossip Examples</name>
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<artifactId>gossip-examples</artifactId>
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<version>0.1.3-incubating-SNAPSHOT</version>
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<dependencies>
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<dependency>
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<groupId>org.apache.gossip</groupId>
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<artifactId>gossip-base</artifactId>
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<version>${project.version}</version>
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</dependency>
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<dependency>
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<groupId>org.apache.gossip</groupId>
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<artifactId>gossip-protocol-jackson</artifactId>
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<version>${project.version}</version>
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</dependency>
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<dependency>
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<groupId>org.apache.gossip</groupId>
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<artifactId>gossip-transport-udp</artifactId>
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<version>${project.version}</version>
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</dependency>
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</dependencies>
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</project>
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@ -0,0 +1,50 @@
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/*
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||||
* Licensed to the Apache Software Foundation (ASF) under one
|
||||
* or more contributor license agreements. See the NOTICE file
|
||||
* distributed with this work for additional information
|
||||
* regarding copyright ownership. The ASF licenses this file
|
||||
* to you under the Apache License, Version 2.0 (the
|
||||
* "License"); you may not use this file except in compliance
|
||||
* with the License. You may obtain a copy of the License at
|
||||
*
|
||||
* http://www.apache.org/licenses/LICENSE-2.0
|
||||
*
|
||||
* Unless required by applicable law or agreed to in writing, software
|
||||
* distributed under the License is distributed on an "AS IS" BASIS,
|
||||
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||||
* See the License for the specific language governing permissions and
|
||||
* limitations under the License.
|
||||
*/
|
||||
package org.apache.gossip.examples;
|
||||
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public class ExampleCommon {
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private boolean clearTerminalScreen = true;
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/*
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* Look for -s in args. If there, suppress terminal-clear on write results Shift args for
|
||||
* positional args, if necessary
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*/
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public String[] checkArgsForClearFlag(String[] args) {
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int pos = 0;
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for (int i = 0; i < args.length; i++) {
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if (args[i].equals("-s")) {
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clearTerminalScreen = false;
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} else {
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// in the case of the -s flag, shift args
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// down by one slot; this will end up with
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// a duplicate entry in the last position of args,
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// but this is ok, because it will be ignored
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args[pos++] = args[i];
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}
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}
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return args;
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}
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public void optionallyClearTerminal() {
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if (clearTerminalScreen) {
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System.out.print("\033[H\033[2J");
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System.out.flush();
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}
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}
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}
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@ -32,7 +32,10 @@ import org.apache.gossip.manager.GossipManagerBuilder;
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public class StandAloneDatacenterAndRack {
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public static void main (String [] args) throws UnknownHostException, InterruptedException {
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private static ExampleCommon common = new ExampleCommon();
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public static void main(String[] args) throws UnknownHostException, InterruptedException {
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args = common.checkArgsForClearFlag(args);
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GossipSettings s = new GossipSettings();
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s.setWindowSize(1000);
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s.setGossipInterval(100);
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@ -44,19 +47,21 @@ public class StandAloneDatacenterAndRack {
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Map<String, String> props = new HashMap<>();
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props.put(DatacenterRackAwareActiveGossiper.DATACENTER, args[4]);
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props.put(DatacenterRackAwareActiveGossiper.RACK, args[5]);
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GossipManager manager = GossipManagerBuilder.newBuilder()
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.cluster("mycluster")
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GossipManager manager = GossipManagerBuilder.newBuilder().cluster("mycluster")
|
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.uri(URI.create(args[0]))
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.id(args[1])
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.gossipSettings(s)
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||||
.gossipMembers(Arrays.asList(new RemoteMember("mycluster", URI.create(args[2]), args[3])))
|
||||
.gossipMembers(
|
||||
Arrays.asList(new RemoteMember("mycluster", URI.create(args[2]), args[3])))
|
||||
.properties(props)
|
||||
.build();
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manager.init();
|
||||
while (true){
|
||||
while (true) {
|
||||
common.optionallyClearTerminal();
|
||||
System.out.println("Live: " + manager.getLiveMembers());
|
||||
System.out.println("Dead: " + manager.getDeadMembers());
|
||||
Thread.sleep(2000);
|
||||
}
|
||||
}
|
||||
|
||||
}
|
||||
@ -26,22 +26,28 @@ import org.apache.gossip.manager.GossipManager;
|
||||
import org.apache.gossip.manager.GossipManagerBuilder;
|
||||
|
||||
public class StandAloneNode {
|
||||
public static void main (String [] args) throws UnknownHostException, InterruptedException{
|
||||
|
||||
private static ExampleCommon common = new ExampleCommon();
|
||||
|
||||
public static void main(String[] args) throws UnknownHostException, InterruptedException {
|
||||
args = common.checkArgsForClearFlag(args);
|
||||
GossipSettings s = new GossipSettings();
|
||||
s.setWindowSize(1000);
|
||||
s.setGossipInterval(100);
|
||||
GossipManager gossipService = GossipManagerBuilder.newBuilder()
|
||||
.cluster("mycluster")
|
||||
GossipManager gossipService = GossipManagerBuilder.newBuilder().cluster("mycluster")
|
||||
.uri(URI.create(args[0]))
|
||||
.id(args[1])
|
||||
.gossipMembers(Arrays.asList( new RemoteMember("mycluster", URI.create(args[2]), args[3])))
|
||||
.gossipMembers(
|
||||
Arrays.asList(new RemoteMember("mycluster", URI.create(args[2]), args[3])))
|
||||
.gossipSettings(s)
|
||||
.build();
|
||||
gossipService.init();
|
||||
while (true){
|
||||
while (true) {
|
||||
common.optionallyClearTerminal();
|
||||
System.out.println("Live: " + gossipService.getLiveMembers());
|
||||
System.out.println("Dead: " + gossipService.getDeadMembers());
|
||||
Thread.sleep(2000);
|
||||
}
|
||||
}
|
||||
|
||||
}
|
||||
@ -31,56 +31,62 @@ import org.apache.gossip.manager.GossipManagerBuilder;
|
||||
import org.apache.gossip.model.SharedDataMessage;
|
||||
|
||||
public class StandAloneNodeCrdtOrSet {
|
||||
public static void main (String [] args) throws InterruptedException, IOException{
|
||||
|
||||
private static ExampleCommon common = new ExampleCommon();
|
||||
|
||||
public static void main(String[] args) throws InterruptedException, IOException {
|
||||
args = common.checkArgsForClearFlag(args);
|
||||
GossipSettings s = new GossipSettings();
|
||||
s.setWindowSize(1000);
|
||||
s.setGossipInterval(100);
|
||||
GossipManager gossipService = GossipManagerBuilder.newBuilder()
|
||||
.cluster("mycluster")
|
||||
GossipManager gossipService = GossipManagerBuilder.newBuilder().cluster("mycluster")
|
||||
.uri(URI.create(args[0]))
|
||||
.id(args[1])
|
||||
.gossipMembers(Arrays.asList( new RemoteMember("mycluster", URI.create(args[2]), args[3])))
|
||||
.gossipMembers(
|
||||
Arrays.asList(new RemoteMember("mycluster", URI.create(args[2]), args[3])))
|
||||
.gossipSettings(s)
|
||||
.build();
|
||||
gossipService.init();
|
||||
|
||||
|
||||
new Thread(() -> {
|
||||
while (true){
|
||||
System.out.println("Live: " + gossipService.getLiveMembers());
|
||||
System.out.println("Dead: " + gossipService.getDeadMembers());
|
||||
System.out.println("---------- " + (gossipService.findCrdt("abc") == null ? "":
|
||||
gossipService.findCrdt("abc").value()));
|
||||
System.out.println("********** " + gossipService.findCrdt("abc"));
|
||||
System.out.println("^^^^^^^^^^ " + (gossipService.findCrdt("def") == null ? "":
|
||||
gossipService.findCrdt("def").value()));
|
||||
System.out.println("$$$$$$$$$$ " + gossipService.findCrdt("def"));
|
||||
try {
|
||||
Thread.sleep(2000);
|
||||
} catch (Exception e) {}
|
||||
while (true) {
|
||||
common.optionallyClearTerminal();
|
||||
System.out.println("Live: " + gossipService.getLiveMembers());
|
||||
System.out.println("Dead: " + gossipService.getDeadMembers());
|
||||
System.out.println("---------- " + (gossipService.findCrdt("abc") == null ? ""
|
||||
: gossipService.findCrdt("abc").value()));
|
||||
System.out.println("********** " + gossipService.findCrdt("abc"));
|
||||
System.out.println("^^^^^^^^^^ " + (gossipService.findCrdt("def") == null ? ""
|
||||
: gossipService.findCrdt("def").value()));
|
||||
System.out.println("$$$$$$$$$$ " + gossipService.findCrdt("def"));
|
||||
try {
|
||||
Thread.sleep(2000);
|
||||
} catch (Exception e) {
|
||||
}
|
||||
}
|
||||
}).start();
|
||||
|
||||
|
||||
String line = null;
|
||||
try (BufferedReader br = new BufferedReader(new InputStreamReader(System.in))){
|
||||
while ( (line = br.readLine()) != null){
|
||||
try (BufferedReader br = new BufferedReader(new InputStreamReader(System.in))) {
|
||||
while ((line = br.readLine()) != null) {
|
||||
System.out.println(line);
|
||||
char op = line.charAt(0);
|
||||
String val = line.substring(2);
|
||||
if (op == 'a'){
|
||||
if (op == 'a') {
|
||||
addData(val, gossipService);
|
||||
} else if (op == 'r') {
|
||||
removeData(val, gossipService);
|
||||
} else if (op == 'g'){
|
||||
} else if (op == 'g') {
|
||||
gcount(val, gossipService);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
private static void gcount(String val, GossipManager gossipManager){
|
||||
|
||||
private static void gcount(String val, GossipManager gossipManager) {
|
||||
GrowOnlyCounter c = (GrowOnlyCounter) gossipManager.findCrdt("def");
|
||||
Long l = Long.valueOf(val);
|
||||
if (c == null){
|
||||
if (c == null) {
|
||||
c = new GrowOnlyCounter(new GrowOnlyCounter.Builder(gossipManager).increment((l)));
|
||||
} else {
|
||||
c = new GrowOnlyCounter(c, new GrowOnlyCounter.Builder(gossipManager).increment((l)));
|
||||
@ -92,19 +98,19 @@ public class StandAloneNodeCrdtOrSet {
|
||||
m.setTimestamp(System.currentTimeMillis());
|
||||
gossipManager.merge(m);
|
||||
}
|
||||
|
||||
private static void removeData(String val, GossipManager gossipService){
|
||||
|
||||
private static void removeData(String val, GossipManager gossipService) {
|
||||
@SuppressWarnings("unchecked")
|
||||
OrSet<String> s = (OrSet<String>) gossipService.findCrdt("abc");
|
||||
SharedDataMessage m = new SharedDataMessage();
|
||||
m.setExpireAt(Long.MAX_VALUE);
|
||||
m.setKey("abc");
|
||||
m.setPayload(new OrSet<String>(s , new OrSet.Builder<String>().remove(val)));
|
||||
m.setPayload(new OrSet<String>(s, new OrSet.Builder<String>().remove(val)));
|
||||
m.setTimestamp(System.currentTimeMillis());
|
||||
gossipService.merge(m);
|
||||
}
|
||||
|
||||
private static void addData(String val, GossipManager gossipService){
|
||||
|
||||
private static void addData(String val, GossipManager gossipService) {
|
||||
SharedDataMessage m = new SharedDataMessage();
|
||||
m.setExpireAt(Long.MAX_VALUE);
|
||||
m.setKey("abc");
|
||||
@ -112,4 +118,5 @@ public class StandAloneNodeCrdtOrSet {
|
||||
m.setTimestamp(System.currentTimeMillis());
|
||||
gossipService.merge(m);
|
||||
}
|
||||
|
||||
}
|
||||
5
gossip-itest/.gitignore
vendored
Normal file
5
gossip-itest/.gitignore
vendored
Normal file
@ -0,0 +1,5 @@
|
||||
# json files generated with running examples in this module
|
||||
pernodedata.*.*.json
|
||||
ringstate.*.*.json
|
||||
shareddata.*.*.json
|
||||
|
||||
5
pom.xml
5
pom.xml
@ -59,6 +59,7 @@
|
||||
<module>gossip-transport-udp</module>
|
||||
<module>gossip-protocol-jackson</module>
|
||||
<module>gossip-itest</module>
|
||||
<module>gossip-examples</module>
|
||||
</modules>
|
||||
|
||||
<description>A peer to peer cluster discovery service</description>
|
||||
@ -195,8 +196,10 @@
|
||||
<artifactId>apache-rat-plugin</artifactId>
|
||||
<configuration>
|
||||
<excludes>
|
||||
<exclude>README.md</exclude>
|
||||
<exclude>**/README.md</exclude>
|
||||
<exclude>eclipse_template.xml</exclude>
|
||||
<!-- files generated by running the examples in gossip-examples -->
|
||||
<exclued>**/*.mycluster.*.json</exclued>
|
||||
</excludes>
|
||||
</configuration>
|
||||
<executions>
|
||||
|
||||
Reference in New Issue
Block a user