[ISSUE #1927]add workflow demo

eventmesh-examples/build.gradle

@@ -30,6 +30,7 @@ dependencies {
     implementation "io.cloudevents:cloudevents-core"
     implementation "io.cloudevents:cloudevents-json-jackson"
     implementation "io.openmessaging:openmessaging-api"
+    implementation 'com.alibaba.nacos:nacos-client:2.1.0'
 
     implementation "io.grpc:grpc-protobuf:${grpcVersion}"
     implementation "io.grpc:grpc-stub:${grpcVersion}"

eventmesh-examples/src/main/java/org/apache/eventmesh/common/ExampleConstants.java

@@ -42,4 +42,13 @@ public class ExampleConstants {
     public static final String DEFAULT_EVENTMESH_TEST_PRODUCER_GROUP = "EventMeshTest-producerGroup";
     public static final String DEFAULT_EVENTMESH_TEST_CONSUMER_GROUP = "EventMeshTest-consumerGroup";
 
+    public static final String SERVER_NAME = "server.name";
+
+    public static final String EVENTMESH_CATALOG_NAME = "eventmesh.catalog.name";
+
+    public static final String EVENTMESH_WORKFLOW_NAME = "eventmesh.workflow.name";
+
+    public static final String EVENTMESH_SELECTOR_NACOS_ADDRESS = "eventmesh.selector.nacos.address";
+
+    public static final String EVENTMESH_SELECTOR_TYPE = "eventmesh.selector.type";
 }

eventmesh-examples/src/main/java/org/apache/eventmesh/grpc/pub/eventmeshmessage/WorkflowAsyncPublishInstance.java

@@ -0,0 +1,85 @@
+/*
+ * 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.grpc.pub.eventmeshmessage;
+
+import org.apache.eventmesh.client.grpc.config.EventMeshGrpcClientConfig;
+import org.apache.eventmesh.client.grpc.producer.EventMeshGrpcProducer;
+import org.apache.eventmesh.client.selector.SelectorFactory;
+import org.apache.eventmesh.client.workflow.EventMeshWorkflowClient;
+import org.apache.eventmesh.client.workflow.config.EventMeshWorkflowClientConfig;
+import org.apache.eventmesh.common.ExampleConstants;
+import org.apache.eventmesh.common.protocol.workflow.protos.ExecuteRequest;
+import org.apache.eventmesh.common.protocol.workflow.protos.ExecuteResponse;
+import org.apache.eventmesh.selector.NacosSelector;
+import org.apache.eventmesh.util.Utils;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Properties;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import com.alibaba.nacos.shaded.com.google.gson.Gson;
+
+import lombok.extern.slf4j.Slf4j;
+
+@Slf4j
+public class WorkflowAsyncPublishInstance {
+
+    private static final Logger logger = LoggerFactory.getLogger(WorkflowAsyncPublishInstance.class);
+
+    public static void main(String[] args) throws Exception {
+
+        Properties properties = Utils.readPropertiesFile(ExampleConstants.CONFIG_FILE_NAME);
+        final String eventMeshIp = properties.getProperty(ExampleConstants.EVENTMESH_IP);
+        final String eventMeshGrpcPort = properties.getProperty(ExampleConstants.EVENTMESH_GRPC_PORT);
+        final String workflowServerName = properties.getProperty(ExampleConstants.EVENTMESH_WORKFLOW_NAME);
+        final String selectorType = properties.getProperty(ExampleConstants.EVENTMESH_SELECTOR_TYPE);
+
+        EventMeshGrpcClientConfig eventMeshClientConfig = EventMeshGrpcClientConfig.builder()
+            .serverAddr(eventMeshIp)
+            .serverPort(Integer.parseInt(eventMeshGrpcPort))
+            .producerGroup(ExampleConstants.DEFAULT_EVENTMESH_TEST_PRODUCER_GROUP)
+            .env("PRD").idc("DEFAULT").password("password")
+            .sys("DEFAULT").build();
+
+        EventMeshGrpcProducer eventMeshGrpcProducer = new EventMeshGrpcProducer(eventMeshClientConfig);
+        eventMeshGrpcProducer.init();
+
+        NacosSelector nacosSelector = new NacosSelector();
+        nacosSelector.init();
+        SelectorFactory.register(selectorType, nacosSelector);
+
+        EventMeshWorkflowClientConfig eventMeshWorkflowClientConfig = EventMeshWorkflowClientConfig.builder().serverName(workflowServerName).build();
+        EventMeshWorkflowClient eventMeshWorkflowClient = new EventMeshWorkflowClient(eventMeshWorkflowClientConfig);
+
+        ExecuteRequest.Builder executeRequest = ExecuteRequest.newBuilder();
+        Map<String, String> content = new HashMap<>();
+        content.put("order_no", "workflowmessage");
+        executeRequest.setInput(new Gson().toJson(content));
+        executeRequest.setId("storeorderworkflow");
+        ExecuteResponse response = eventMeshWorkflowClient.getWorkflowClient().execute(executeRequest.build());
+        logger.info("received response: {}", response.toString());
+
+        Thread.sleep(60000);
+        try (EventMeshGrpcProducer ignore = eventMeshGrpcProducer) {
+            // ignore
+        }
+    }
+}

eventmesh-examples/src/main/java/org/apache/eventmesh/grpc/sub/WorkflowAsyncSubscribe.java

@@ -0,0 +1,103 @@
+/*
+ * 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.grpc.sub;
+
+import org.apache.eventmesh.client.catalog.EventMeshCatalogClient;
+import org.apache.eventmesh.client.catalog.config.EventMeshCatalogClientConfig;
+import org.apache.eventmesh.client.grpc.config.EventMeshGrpcClientConfig;
+import org.apache.eventmesh.client.grpc.consumer.EventMeshGrpcConsumer;
+import org.apache.eventmesh.client.grpc.consumer.ReceiveMsgHook;
+import org.apache.eventmesh.client.selector.SelectorFactory;
+import org.apache.eventmesh.client.tcp.common.EventMeshCommon;
+import org.apache.eventmesh.client.workflow.EventMeshWorkflowClient;
+import org.apache.eventmesh.client.workflow.config.EventMeshWorkflowClientConfig;
+import org.apache.eventmesh.common.EventMeshMessage;
+import org.apache.eventmesh.common.ExampleConstants;
+import org.apache.eventmesh.common.protocol.workflow.protos.ExecuteRequest;
+import org.apache.eventmesh.common.protocol.workflow.protos.ExecuteResponse;
+import org.apache.eventmesh.selector.NacosSelector;
+import org.apache.eventmesh.util.Utils;
+
+import java.util.Map;
+import java.util.Optional;
+import java.util.Properties;
+
+import lombok.extern.slf4j.Slf4j;
+
+@Slf4j
+public class WorkflowAsyncSubscribe implements ReceiveMsgHook<EventMeshMessage> {
+
+    public static WorkflowAsyncSubscribe handler = new WorkflowAsyncSubscribe();
+    public static EventMeshWorkflowClient workflowClient;
+
+    public static void main(String[] args) throws Exception {
+        Properties properties = Utils.readPropertiesFile(ExampleConstants.CONFIG_FILE_NAME);
+        final String eventMeshIp = properties.getProperty(ExampleConstants.EVENTMESH_IP);
+        final String eventMeshGrpcPort = properties.getProperty(ExampleConstants.EVENTMESH_GRPC_PORT);
+        final String serverName = "express";
+        final String catalogServerName = properties.getProperty(ExampleConstants.EVENTMESH_CATALOG_NAME);
+        final String workflowServerName = properties.getProperty(ExampleConstants.EVENTMESH_WORKFLOW_NAME);
+        final String selectorType = properties.getProperty(ExampleConstants.EVENTMESH_SELECTOR_TYPE);
+
+        EventMeshGrpcClientConfig eventMeshClientConfig = EventMeshGrpcClientConfig.builder()
+            .serverAddr(eventMeshIp)
+            .serverPort(Integer.parseInt(eventMeshGrpcPort))
+            .consumerGroup(ExampleConstants.DEFAULT_EVENTMESH_TEST_CONSUMER_GROUP)
+            .env("env").idc("default").password("password")
+            .sys("default").build();
+
+        EventMeshGrpcConsumer eventMeshGrpcConsumer = new EventMeshGrpcConsumer(eventMeshClientConfig);
+        eventMeshGrpcConsumer.init();
+        eventMeshGrpcConsumer.registerListener(handler);
+
+        NacosSelector nacosSelector = new NacosSelector();
+        nacosSelector.init();
+        SelectorFactory.register(selectorType, nacosSelector);
+
+        EventMeshCatalogClientConfig eventMeshCatalogClientConfig = EventMeshCatalogClientConfig.builder().serverName(catalogServerName)
+            .appServerName(serverName).build();
+        EventMeshCatalogClient eventMeshCatalogClient = new EventMeshCatalogClient(eventMeshCatalogClientConfig, eventMeshGrpcConsumer);
+        eventMeshCatalogClient.init();
+
+        EventMeshWorkflowClientConfig eventMeshWorkflowClientConfig = EventMeshWorkflowClientConfig.builder().serverName(workflowServerName).build();
+        workflowClient = new EventMeshWorkflowClient(eventMeshWorkflowClientConfig);
+
+        Thread.sleep(60000);
+        eventMeshCatalogClient.destroy();
+    }
+
+    @Override
+    public Optional<EventMeshMessage> handle(EventMeshMessage msg) throws Exception {
+        log.info("receive async msg: {}", msg);
+        Map<String, String> props = msg.getProp();
+        String workflowInstanceId = props.get("workflowinstanceid");
+        String taskInstanceId = props.get("workflowtaskinstanceid");
+
+        ExecuteRequest executeRequest = ExecuteRequest.newBuilder().setId("storeorderworkflow")
+            .setTaskInstanceId(taskInstanceId)
+            .setInstanceId(workflowInstanceId).build();
+        ExecuteResponse response = workflowClient.getWorkflowClient().execute(executeRequest);
+        log.info("receive workflow msg: {}", response.getInstanceId());
+        return Optional.empty();
+    }
+
+    @Override
+    public String getProtocolType() {
+        return EventMeshCommon.EM_MESSAGE_PROTOCOL_NAME;
+    }
+}

eventmesh-examples/src/main/java/org/apache/eventmesh/grpc/sub/WorkflowOrderAsyncSubscribe.java

@@ -0,0 +1,104 @@
+/*
+ * 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.grpc.sub;
+
+import org.apache.eventmesh.client.catalog.EventMeshCatalogClient;
+import org.apache.eventmesh.client.catalog.config.EventMeshCatalogClientConfig;
+import org.apache.eventmesh.client.grpc.config.EventMeshGrpcClientConfig;
+import org.apache.eventmesh.client.grpc.consumer.EventMeshGrpcConsumer;
+import org.apache.eventmesh.client.grpc.consumer.ReceiveMsgHook;
+import org.apache.eventmesh.client.selector.SelectorFactory;
+import org.apache.eventmesh.client.tcp.common.EventMeshCommon;
+import org.apache.eventmesh.client.workflow.EventMeshWorkflowClient;
+import org.apache.eventmesh.client.workflow.config.EventMeshWorkflowClientConfig;
+import org.apache.eventmesh.common.EventMeshMessage;
+import org.apache.eventmesh.common.ExampleConstants;
+import org.apache.eventmesh.common.protocol.workflow.protos.ExecuteRequest;
+import org.apache.eventmesh.common.protocol.workflow.protos.ExecuteResponse;
+import org.apache.eventmesh.selector.NacosSelector;
+import org.apache.eventmesh.util.Utils;
+
+import java.util.Map;
+import java.util.Optional;
+import java.util.Properties;
+
+import lombok.extern.slf4j.Slf4j;
+
+@Slf4j
+public class WorkflowOrderAsyncSubscribe implements ReceiveMsgHook<EventMeshMessage> {
+
+    public static WorkflowOrderAsyncSubscribe handler = new WorkflowOrderAsyncSubscribe();
+    public static EventMeshWorkflowClient workflowClient;
+
+    public static void main(String[] args) throws Exception {
+        Properties properties = Utils.readPropertiesFile(ExampleConstants.CONFIG_FILE_NAME);
+        final String eventMeshIp = properties.getProperty(ExampleConstants.EVENTMESH_IP);
+        final String eventMeshGrpcPort = properties.getProperty(ExampleConstants.EVENTMESH_GRPC_PORT);
+        final String serverName = "order";
+        final String workflowServerName = properties.getProperty(ExampleConstants.EVENTMESH_WORKFLOW_NAME);
+        final String catalogServerName = properties.getProperty(ExampleConstants.EVENTMESH_CATALOG_NAME);
+        final String selectorType = properties.getProperty(ExampleConstants.EVENTMESH_SELECTOR_TYPE);
+
+        EventMeshGrpcClientConfig eventMeshClientConfig = EventMeshGrpcClientConfig.builder()
+            .serverAddr(eventMeshIp)
+            .serverPort(Integer.parseInt(eventMeshGrpcPort))
+            .consumerGroup(ExampleConstants.DEFAULT_EVENTMESH_TEST_CONSUMER_GROUP)
+            .env("test").idc("default").password("password")
+            .sys("default").build();
+
+        EventMeshGrpcConsumer eventMeshGrpcConsumer = new EventMeshGrpcConsumer(eventMeshClientConfig);
+        eventMeshGrpcConsumer.init();
+        eventMeshGrpcConsumer.registerListener(handler);
+
+        NacosSelector nacosSelector = new NacosSelector();
+        nacosSelector.init();
+        SelectorFactory.register(selectorType, nacosSelector);
+
+        EventMeshCatalogClientConfig eventMeshCatalogClientConfig = EventMeshCatalogClientConfig.builder().serverName(catalogServerName)
+            .appServerName(serverName).build();
+        EventMeshCatalogClient eventMeshCatalogClient = new EventMeshCatalogClient(eventMeshCatalogClientConfig, eventMeshGrpcConsumer);
+        eventMeshCatalogClient.init();
+
+        EventMeshWorkflowClientConfig eventMeshWorkflowClientConfig = EventMeshWorkflowClientConfig.builder().serverName(workflowServerName).build();
+        workflowClient = new EventMeshWorkflowClient(eventMeshWorkflowClientConfig);
+
+        Thread.sleep(60000);
+        eventMeshCatalogClient.destroy();
+    }
+
+    @Override
+    public Optional<EventMeshMessage> handle(EventMeshMessage msg) throws Exception {
+        log.info("receive async msg: {}", msg);
+
+        Map<String, String> props = msg.getProp();
+        String workflowInstanceId = props.get("workflowinstanceid");
+        String taskInstanceId = props.get("workflowtaskinstanceid");
+
+        ExecuteRequest executeRequest = ExecuteRequest.newBuilder().setId("storeorderworkflow")
+            .setTaskInstanceId(taskInstanceId)
+            .setInstanceId(workflowInstanceId).build();
+        ExecuteResponse response = workflowClient.getWorkflowClient().execute(executeRequest);
+        log.info("receive workflow msg: {}", response.getInstanceId());
+        return Optional.empty();
+    }
+
+    @Override
+    public String getProtocolType() {
+        return EventMeshCommon.EM_MESSAGE_PROTOCOL_NAME;
+    }
+}