[ISSUE #900] Support Consul Service Registry

eventmesh-registry-plugin/eventmesh-registry-consul/build.gradle

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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.
+ */
+
+dependencies {
+    implementation 'com.ecwid.consul:consul-api:1.4.5'
+    implementation 'org.apache.httpcomponents:httpclient:4.5.13'
+    implementation project(":eventmesh-registry-plugin:eventmesh-registry-api")
+    implementation project(":eventmesh-common")
+    testImplementation "org.mockito:mockito-core"
+}

eventmesh-registry-plugin/eventmesh-registry-consul/src/main/java/org/apache/eventmesh/registry/consul/service/ConsulRegistryService.java

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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.eventmesh.registry.consul.service;
+
+import org.apache.eventmesh.api.exception.RegistryException;
+import org.apache.eventmesh.api.registry.RegistryService;
+import org.apache.eventmesh.api.registry.dto.EventMeshDataInfo;
+import org.apache.eventmesh.api.registry.dto.EventMeshRegisterInfo;
+import org.apache.eventmesh.api.registry.dto.EventMeshUnRegisterInfo;
+import org.apache.eventmesh.common.config.CommonConfiguration;
+import org.apache.eventmesh.common.utils.ConfigurationContextUtil;
+
+import org.apache.commons.lang3.StringUtils;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+import java.util.Map;
+import java.util.concurrent.atomic.AtomicBoolean;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import com.ecwid.consul.v1.ConsulClient;
+import com.ecwid.consul.v1.ConsulRawClient;
+import com.ecwid.consul.v1.agent.model.NewService;
+import com.ecwid.consul.v1.agent.model.Service;
+import com.ecwid.consul.v1.health.HealthServicesRequest;
+import com.ecwid.consul.v1.health.model.HealthService;
+
+public class ConsulRegistryService implements RegistryService {
+
+    public static final String IP_PORT_SEPARATOR = ":";
+
+    private static final Logger logger = LoggerFactory.getLogger(ConsulRegistryService.class);
+
+    private static final AtomicBoolean INIT_STATUS = new AtomicBoolean(false);
+
+    private static final AtomicBoolean START_STATUS = new AtomicBoolean(false);
+
+    private String consulHost;
+
+    private String consulPort;
+
+    private ConsulClient consulClient;
+
+    private String token;
+
+    @Override
+    public void init() throws RegistryException {
+        if (INIT_STATUS.compareAndSet(false, true)) {
+            for (String key : ConfigurationContextUtil.KEYS) {
+                CommonConfiguration commonConfiguration = ConfigurationContextUtil.get(key);
+                if (null != commonConfiguration) {
+                    String namesrvAddr = commonConfiguration.namesrvAddr;
+                    if (StringUtils.isBlank(namesrvAddr)) {
+                        throw new RegistryException("namesrvAddr cannot be null");
+                    }
+                    String[] addr = namesrvAddr.split(":");
+                    if (addr.length != 2) {
+                        throw new RegistryException("Illegal namesrvAddr");
+                    }
+                    this.consulHost = addr[0];
+                    this.consulPort = addr[1];
+                    break;
+                }
+            }
+        }
+    }
+
+    @Override
+    public void start() throws RegistryException {
+        consulClient = new ConsulClient(new ConsulRawClient(consulHost, Integer.parseInt(consulPort)));
+    }
+
+    @Override
+    public void shutdown() throws RegistryException {
+        INIT_STATUS.compareAndSet(true, false);
+        START_STATUS.compareAndSet(true, false);
+        consulClient = null;
+    }
+
+    @Override
+    public boolean register(EventMeshRegisterInfo eventMeshRegisterInfo) throws RegistryException {
+        try {
+            String[] ipPort = eventMeshRegisterInfo.getEndPoint().split(IP_PORT_SEPARATOR);
+            NewService service = new NewService();
+            service.setPort(Integer.parseInt(ipPort[1]));
+            service.setAddress(ipPort[0]);
+            service.setName(eventMeshRegisterInfo.getEventMeshName());
+            service.setId(eventMeshRegisterInfo.getEventMeshClusterName() + "-" + eventMeshRegisterInfo.getEventMeshName());
+            consulClient.agentServiceRegister(service, token);
+        } catch (Exception e) {
+            throw new RegistryException(e.getMessage());
+        }
+        logger.info("EventMesh successfully registered to consul");
+        return true;
+    }
+
+    @Override
+    public boolean unRegister(EventMeshUnRegisterInfo eventMeshUnRegisterInfo) throws RegistryException {
+        try {
+            consulClient.agentServiceDeregister(eventMeshUnRegisterInfo.getEventMeshClusterName() + "-" + eventMeshUnRegisterInfo.getEventMeshName(),
+                token);
+        } catch (Exception e) {
+            throw new RegistryException(e.getMessage());
+        }
+        logger.info("EventMesh successfully unregistered to consul");
+        return true;
+    }
+
+    @Override
+    public List<EventMeshDataInfo> findEventMeshInfoByCluster(String clusterName) throws RegistryException {
+        HealthServicesRequest request = HealthServicesRequest.newBuilder().setPassing(true).setToken(token).build();
+        List<HealthService> healthServices = consulClient.getHealthServices(clusterName, request).getValue();
+        List<EventMeshDataInfo> eventMeshDataInfos = new ArrayList<>();
+        healthServices.forEach(healthService -> {
+            HealthService.Service service = healthService.getService();
+            String[] split = service.getId().split("-");
+            eventMeshDataInfos.add(new EventMeshDataInfo(split[0], split[1], service.getAddress() + ":" + service.getPort(), 0, service.getMeta()));
+        });
+        return eventMeshDataInfos;
+    }
+
+    @Override
+    public List<EventMeshDataInfo> findAllEventMeshInfo() throws RegistryException {
+        Map<String, Service> agentServices = consulClient.getAgentServices().getValue();
+        List<EventMeshDataInfo> eventMeshDataInfos = new ArrayList<>();
+        agentServices.forEach((k, v) -> {
+            String[] split = v.getId().split("-");
+            eventMeshDataInfos.add(new EventMeshDataInfo(split[0], split[1], v.getAddress() + ":" + v.getPort(), 0, v.getMeta()));
+        });
+        return eventMeshDataInfos;
+    }
+
+    @Override
+    public Map<String, Map<String, Integer>> findEventMeshClientDistributionData(String clusterName, String group, String purpose)
+        throws RegistryException {
+        return Collections.emptyMap();
+    }
+
+    @Override
+    public void registerMetadata(Map<String, String> metadataMap) {
+
+    }
+
+    public ConsulClient getConsulClient() {
+        return consulClient;
+    }
+}

eventmesh-registry-plugin/eventmesh-registry-consul/src/main/java/org/apache/eventmesh/registry/consul/service/HeatBeatScheduler.java

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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.eventmesh.registry.consul.service;
+
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.ScheduledExecutorService;
+import java.util.concurrent.ScheduledThreadPoolExecutor;
+import java.util.concurrent.TimeUnit;
+
+import com.ecwid.consul.v1.ConsulClient;
+import com.ecwid.consul.v1.agent.model.NewService;
+
+public class HeatBeatScheduler {
+
+    private final ConsulClient consulClient;
+
+    private final ConcurrentHashMap<String, NewService> heartBeatMap = new ConcurrentHashMap<>();
+
+    private final ScheduledExecutorService heartbeatServiceExecutor = new ScheduledThreadPoolExecutor(
+        Runtime.getRuntime().availableProcessors(),
+        r -> {
+            Thread thread = new Thread(r);
+            thread.setDaemon(true);
+            thread.setName("ConsulHeartbeatService");
+            return thread;
+        }
+    );
+
+    public HeatBeatScheduler(ConsulClient consulClient) {
+        this.consulClient = consulClient;
+    }
+
+    /**
+     * start service heartbeat
+     *
+     * @param newService service
+     * @param aclToken   token
+     */
+    protected void startHeartBeat(NewService newService, String aclToken) {
+        heartbeatServiceExecutor.execute(new HeartBeat(newService, aclToken));
+        heartBeatMap.put(newService.getName(), newService);
+    }
+
+    /**
+     * stop service heartbeat
+     *
+     * @param newService service
+     */
+    private void stopHeartBeat(NewService newService) {
+        heartBeatMap.remove(newService.getName());
+    }
+
+    class HeartBeat implements Runnable {
+
+        private static final String CHECK_ID_PREFIX = "service:";
+
+        private String checkId;
+
+        private final String aclToken;
+
+        private final NewService instance;
+
+        public HeartBeat(NewService instance, String aclToken) {
+            this.instance = instance;
+            this.checkId = instance.getId();
+            this.aclToken = aclToken;
+            if (!checkId.startsWith(CHECK_ID_PREFIX)) {
+                checkId = CHECK_ID_PREFIX + checkId;
+            }
+        }
+
+        @Override
+        public void run() {
+            try {
+                if (aclToken != null) {
+                    consulClient.agentCheckPass(checkId, aclToken);
+                    return;
+                }
+                if (heartBeatMap.contains(instance)) {
+                    consulClient.agentCheckPass(checkId);
+                }
+            } finally {
+                heartbeatServiceExecutor.schedule(this, 3000, TimeUnit.SECONDS);
+            }
+        }
+
+    }
+}

eventmesh-registry-plugin/eventmesh-registry-consul/src/main/resources/META-INF/eventmesh/org.apache.eventmesh.api.registry.RegistryService

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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.
+
+consul=org.apache.eventmesh.registry.consul.service.ConsulRegistryService