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GOSSIP-43 cleanup sockets, readme, and use lambdas

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This commit is contained in:
Edward Capriolo
2017-01-15 16:01:43 -05:00
parent 9487b8c223
commit 7af6b677e8
5 changed files with 57 additions and 138 deletions
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37
README.md
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@ -14,7 +14,8 @@ To gossip you need one or more seed nodes. Seed is just a list of places to init
int seedNodes = 3;
List<GossipMember> startupMembers = new ArrayList<>();
for (int i = 1; i < seedNodes+1; ++i) {
startupMembers.add(new RemoteGossipMember("127.0.0." + i, 2000, i + ""));
URI uri = new URI("udp://" + "127.0.0.1" + ":" + (50000 + i));
startupMembers.add(new RemoteGossipMember(cluster, uri, i + ""));
}
```
@ -24,10 +25,9 @@ Here we start five gossip processes and check that they discover each other. (No
List<GossipService> clients = new ArrayList<>();
int clusterMembers = 5;
for (int i = 1; i < clusterMembers+1; ++i) {
GossipService gossipService = new GossipService("127.0.0." + i, 2000, i + "",
LogLevel.DEBUG, startupMembers, settings, null);
clients.add(gossipService);
gossipService.start();
URI uri = new URI("udp://" + "127.0.0.1" + ":" + (50000 + i));
GossipService gossipService = new GossipService(cluster, uri, i + "",
startupMembers, settings, (a,b) -> {});
}
```
@ -47,22 +47,24 @@ For a very simple client setup with a settings file you first need a JSON file s
```json
[{
"id":"419af818-0114-4c7b-8fdb-952915335ce4",
"port":50001,
"cluster":"9f1e6ddf-8e1c-4026-8fc6-8585d0132f77",
"id":"447c5bec-f112-492d-968b-f64c8e36dfd7",
"uri":"udp://127.0.0.1:50001",
"gossip_interval":1000,
"cleanup_interval":10000,
"members":[
{"host":"127.0.0.1", "port":50000}
{"cluster": "9f1e6ddf-8e1c-4026-8fc6-8585d0132f77","uri":"udp://127.0.0.1:5000"}
]
}]
```
where:
* `cluster` - is the name of the cluster
* `id` - is a unique id for this node (you can use any string, but above we use a UUID)
* `port` - the port to use on the default adapter on the node's machine
* `uri` - is a URI object containing IP/hostname and port to use on the default adapter on the node's machine
* `gossip_interval` - how often (in milliseconds) to gossip list of members to other node(s)
* `cleanup_interval` - when to remove 'dead' nodes (in milliseconds)
* `cleanup_interval` - when to remove 'dead' nodes (in milliseconds) (deprecated may be coming back)
* `members` - initial seed nodes
Then starting a local node is as simple as:
@ -96,13 +98,14 @@ These can be accessed from the `GossipManager` on your `GossipService`, e.g:
Users can also attach an event listener:
```java
GossipService gossipService = new GossipService("127.0.0." + i, 2000, i + "", LogLevel.DEBUG,
startupMembers, settings,
new GossipListener(){
@Override
public void gossipEvent(GossipMember member, GossipState state) {
System.out.println(member+" "+ state);
}
GossipService gossipService = new GossipService(cluster, uri, i + "", startupMembers,
settings, new GossipListener() {
@Override
public void gossipEvent(GossipMember member, GossipState state) {
System.out.println(System.currentTimeMillis() + " Member " + j + " reports "
+ member + " " + state);
}
});
//The lambda syntax is (a,b) -> { } //NICE!
```