GOSSIP-86 Examples in separate module - Added Readme.
This commit is contained in:
Terry Weymouth
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/*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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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
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* 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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/*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.apache.gossip.examples;
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import java.net.URI;
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import java.net.UnknownHostException;
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import java.util.Arrays;
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import java.util.HashMap;
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import java.util.Map;
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import org.apache.gossip.GossipSettings;
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import org.apache.gossip.RemoteMember;
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import org.apache.gossip.manager.DatacenterRackAwareActiveGossiper;
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import org.apache.gossip.manager.GossipManager;
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import org.apache.gossip.manager.GossipManagerBuilder;
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public class StandAloneDatacenterAndRack {
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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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s.setActiveGossipClass(DatacenterRackAwareActiveGossiper.class.getName());
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Map<String, String> gossipProps = new HashMap<>();
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gossipProps.put("sameRackGossipIntervalMs", "2000");
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gossipProps.put("differentDatacenterGossipIntervalMs", "10000");
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s.setActiveGossipProperties(gossipProps);
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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().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(
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Arrays.asList(new RemoteMember("mycluster", URI.create(args[2]), args[3])))
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.properties(props)
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.build();
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manager.init();
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while (true) {
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common.optionallyClearTerminal();
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System.out.println("Live: " + manager.getLiveMembers());
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System.out.println("Dead: " + manager.getDeadMembers());
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Thread.sleep(2000);
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}
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}
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}
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/*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.apache.gossip.examples;
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import java.net.URI;
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import java.net.UnknownHostException;
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import java.util.Arrays;
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import org.apache.gossip.GossipSettings;
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import org.apache.gossip.RemoteMember;
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import org.apache.gossip.manager.GossipManager;
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import org.apache.gossip.manager.GossipManagerBuilder;
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public class StandAloneNode {
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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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GossipManager gossipService = GossipManagerBuilder.newBuilder().cluster("mycluster")
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.uri(URI.create(args[0]))
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.id(args[1])
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.gossipMembers(
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Arrays.asList(new RemoteMember("mycluster", URI.create(args[2]), args[3])))
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.gossipSettings(s)
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.build();
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gossipService.init();
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while (true) {
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common.optionallyClearTerminal();
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System.out.println("Live: " + gossipService.getLiveMembers());
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System.out.println("Dead: " + gossipService.getDeadMembers());
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Thread.sleep(2000);
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}
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}
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}
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@ -0,0 +1,122 @@
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/*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.apache.gossip.examples;
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import java.io.BufferedReader;
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import java.io.IOException;
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import java.io.InputStreamReader;
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import java.net.URI;
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import java.util.Arrays;
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import org.apache.gossip.GossipSettings;
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import org.apache.gossip.RemoteMember;
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import org.apache.gossip.crdt.GrowOnlyCounter;
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import org.apache.gossip.crdt.OrSet;
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import org.apache.gossip.manager.GossipManager;
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import org.apache.gossip.manager.GossipManagerBuilder;
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import org.apache.gossip.model.SharedDataMessage;
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public class StandAloneNodeCrdtOrSet {
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private static ExampleCommon common = new ExampleCommon();
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public static void main(String[] args) throws InterruptedException, IOException {
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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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GossipManager gossipService = GossipManagerBuilder.newBuilder().cluster("mycluster")
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.uri(URI.create(args[0]))
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.id(args[1])
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.gossipMembers(
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Arrays.asList(new RemoteMember("mycluster", URI.create(args[2]), args[3])))
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.gossipSettings(s)
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.build();
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gossipService.init();
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new Thread(() -> {
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while (true) {
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common.optionallyClearTerminal();
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System.out.println("Live: " + gossipService.getLiveMembers());
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System.out.println("Dead: " + gossipService.getDeadMembers());
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System.out.println("---------- " + (gossipService.findCrdt("abc") == null ? ""
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: gossipService.findCrdt("abc").value()));
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System.out.println("********** " + gossipService.findCrdt("abc"));
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System.out.println("^^^^^^^^^^ " + (gossipService.findCrdt("def") == null ? ""
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: gossipService.findCrdt("def").value()));
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System.out.println("$$$$$$$$$$ " + gossipService.findCrdt("def"));
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try {
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Thread.sleep(2000);
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} catch (Exception e) {
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}
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}
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}).start();
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String line = null;
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try (BufferedReader br = new BufferedReader(new InputStreamReader(System.in))) {
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while ((line = br.readLine()) != null) {
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System.out.println(line);
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char op = line.charAt(0);
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String val = line.substring(2);
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if (op == 'a') {
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addData(val, gossipService);
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} else if (op == 'r') {
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removeData(val, gossipService);
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} else if (op == 'g') {
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gcount(val, gossipService);
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}
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}
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}
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}
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private static void gcount(String val, GossipManager gossipManager) {
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GrowOnlyCounter c = (GrowOnlyCounter) gossipManager.findCrdt("def");
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Long l = Long.valueOf(val);
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if (c == null) {
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c = new GrowOnlyCounter(new GrowOnlyCounter.Builder(gossipManager).increment((l)));
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} else {
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c = new GrowOnlyCounter(c, new GrowOnlyCounter.Builder(gossipManager).increment((l)));
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}
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SharedDataMessage m = new SharedDataMessage();
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m.setExpireAt(Long.MAX_VALUE);
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m.setKey("def");
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m.setPayload(c);
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m.setTimestamp(System.currentTimeMillis());
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gossipManager.merge(m);
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}
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private static void removeData(String val, GossipManager gossipService) {
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@SuppressWarnings("unchecked")
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OrSet<String> s = (OrSet<String>) gossipService.findCrdt("abc");
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SharedDataMessage m = new SharedDataMessage();
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m.setExpireAt(Long.MAX_VALUE);
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m.setKey("abc");
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m.setPayload(new OrSet<String>(s, new OrSet.Builder<String>().remove(val)));
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m.setTimestamp(System.currentTimeMillis());
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gossipService.merge(m);
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}
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private static void addData(String val, GossipManager gossipService) {
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SharedDataMessage m = new SharedDataMessage();
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m.setExpireAt(Long.MAX_VALUE);
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m.setKey("abc");
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m.setPayload(new OrSet<String>(val));
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m.setTimestamp(System.currentTimeMillis());
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gossipService.merge(m);
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}
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}
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