[GitHub] [skywalking] wu-sheng commented on a change in pull request #6702: Generate the corresponding event information for the alert.

[GitBox <gi...@apache.org>]

wu-sheng commented on a change in pull request #6702:
URL: https://github.com/apache/skywalking/pull/6702#discussion_r608598281



##########
File path: oap-server/server-alarm-plugin/src/main/java/org/apache/skywalking/oap/server/core/alarm/provider/EventHookCallback.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.skywalking.oap.server.core.alarm.provider;
+
+import org.apache.skywalking.apm.network.event.v3.Event;
+import org.apache.skywalking.apm.network.event.v3.Source;
+import org.apache.skywalking.apm.network.event.v3.Type;
+import org.apache.skywalking.oap.server.analyzer.event.EventAnalyzerModule;
+import org.apache.skywalking.oap.server.analyzer.event.EventAnalyzerService;
+import org.apache.skywalking.oap.server.core.alarm.AlarmCallback;
+import org.apache.skywalking.oap.server.core.alarm.AlarmMessage;
+import org.apache.skywalking.oap.server.core.analysis.IDManager;
+import org.apache.skywalking.oap.server.core.source.DefaultScopeDefine;
+import org.apache.skywalking.oap.server.library.module.ModuleManager;
+
+import java.util.List;
+import java.util.UUID;
+
+/**
+ * EventCallBack: When an alert is present, an event is generated for each alert message. These events are then sent to the internal event analyzer.
+ *
+ */
+public class EventHookCallback implements AlarmCallback {
+
+    private final ModuleManager manager;
+
+    public EventHookCallback(ModuleManager manager) {
+        this.manager = manager;
+    }
+
+    @Override
+    public void doAlarm(List<AlarmMessage> alarmMessage) {
+        if (null == manager) {
+            return ;
+        }
+        EventAnalyzerService analyzerService = manager.find(EventAnalyzerModule.NAME).provider().getService(EventAnalyzerService.class);
+        alarmMessage.forEach(a -> {
+            analyzerService.analyze(constructCurrentEvent(a));
+        });
+    }
+
+    private Event constructCurrentEvent(AlarmMessage msg) {
+        long millis = System.currentTimeMillis();
+        Event event =  Event.newBuilder()
+                .setUuid(UUID.randomUUID().toString())
+                .setName("Alarm")
+                .setStartTime(millis)
+                .setMessage(msg.getAlarmMessage())
+                .setType(Type.Error)
+                .setEndTime(millis)
+                .build();
+
+        switch (msg.getScopeId()) {
+            case DefaultScopeDefine.SERVICE :
+                IDManager.ServiceID.ServiceIDDefinition serviceIdDef = IDManager.ServiceID.analysisId(msg.getId0());
+                event = event.toBuilder().setSource(
+                    Source.newBuilder()
+                            .setService(serviceIdDef.getName())
+                            .build()
+                ).build();
+                break;
+            case DefaultScopeDefine.SERVICE_INSTANCE :
+                IDManager.ServiceInstanceID.InstanceIDDefinition instanceIdDef = IDManager.ServiceInstanceID.analysisId(msg.getId0());
+                event = event.toBuilder().setSource(
+                        Source.newBuilder()
+                                .setServiceInstance(instanceIdDef.getName())
+                                .build()
+                ).build();
+                break;
+            case DefaultScopeDefine.ENDPOINT :
+                IDManager.EndpointID.EndpointIDDefinition endpointIDDef = IDManager.EndpointID.analysisId(msg.getId0());
+                event = event.toBuilder().setSource(
+                        Source.newBuilder()
+                                .setEndpoint(endpointIDDef.getEndpointName())
+                                .build()
+                ).build();
+                break;
+            default:
+                event = event.toBuilder().setSource(
+                        Source.newBuilder()
+                                .setService(msg.getName())
+                                .build()
+                ).build();

Review comment:
       Why default should be a service level event?




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