把版本更新和清除拆分成两个事件

discovery-plugin-admin-center/src/main/java/com/nepxion/discovery/plugin/admincenter/endpoint/VersionEndpoint.java

@@ -33,7 +33,8 @@ import org.springframework.web.bind.annotation.RestController;
 import com.nepxion.discovery.plugin.framework.adapter.PluginAdapter;
 import com.nepxion.discovery.plugin.framework.context.PluginContextAware;
 import com.nepxion.discovery.plugin.framework.event.PluginEventWapper;
-import com.nepxion.discovery.plugin.framework.event.VersionChangedEvent;
+import com.nepxion.discovery.plugin.framework.event.VersionClearedEvent;
+import com.nepxion.discovery.plugin.framework.event.VersionUpdatedEvent;
 
 @RestController
 @Api(tags = { "版本接口" })
@@ -58,7 +59,7 @@ public class VersionEndpoint implements MvcEndpoint {
             return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).body("Discovery control is disabled");
         }
 
-        pluginEventWapper.fireVersionChanged(new VersionChangedEvent(VersionChangedEvent.EventType.VERSION_UPDATE, version), true);
+        pluginEventWapper.fireVersionUpdated(new VersionUpdatedEvent(version), true);
 
         return ResponseEntity.ok().body("OK");
     }
@@ -73,7 +74,7 @@ public class VersionEndpoint implements MvcEndpoint {
             return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).body("Discovery control is disabled");
         }
 
-        pluginEventWapper.fireVersionChanged(new VersionChangedEvent(VersionChangedEvent.EventType.VERSION_CLEAR), true);
+        pluginEventWapper.fireVersionCleared(new VersionClearedEvent(), true);
 
         return ResponseEntity.ok().body("OK");
     }

discovery-plugin-framework/src/main/java/com/nepxion/discovery/plugin/framework/event/PluginEventWapper.java

@@ -26,11 +26,19 @@ public class PluginEventWapper {
         }
     }
 
-    public void fireVersionChanged(VersionChangedEvent versionChangedEvent, boolean async) {
+    public void fireVersionUpdated(VersionUpdatedEvent versionUpdatedEvent, boolean async) {
         if (async) {
-            pluginPublisher.asyncPublish(versionChangedEvent);
+            pluginPublisher.asyncPublish(versionUpdatedEvent);
         } else {
-            pluginSubscriber.onVersionChanged(versionChangedEvent);
+            pluginSubscriber.onVersionUpdated(versionUpdatedEvent);
+        }
+    }
+
+    public void fireVersionCleared(VersionClearedEvent versionClearedEvent, boolean async) {
+        if (async) {
+            pluginPublisher.asyncPublish(versionClearedEvent);
+        } else {
+            pluginSubscriber.onVersionCleared(versionClearedEvent);
         }
     }
 }
\ No newline at end of file

discovery-plugin-framework/src/main/java/com/nepxion/discovery/plugin/framework/event/PluginSubscriber.java

@@ -11,6 +11,7 @@ package com.nepxion.discovery.plugin.framework.event;
 
 import java.io.InputStream;
 
+import org.apache.commons.lang3.StringUtils;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.beans.factory.annotation.Autowired;
@@ -57,7 +58,7 @@ public class PluginSubscriber {
             return;
         }
 
-        LOG.info("********** Remote config change has been subscribed **********");
+        LOG.info("********** Remote config changing has been triggered **********");
 
         if (ruleChangedEvent == null) {
             throw new PluginException("RuleChangedEvent can't be null");
@@ -76,7 +77,7 @@ public class PluginSubscriber {
     }
 
     @Subscribe
-    public void onVersionChanged(VersionChangedEvent versionChangedEvent) {
+    public void onVersionUpdated(VersionUpdatedEvent versionUpdatedEvent) {
         Boolean discoveryControlEnabled = pluginContextAware.isDiscoveryControlEnabled();
         if (!discoveryControlEnabled) {
             LOG.info("********** Discovery control is disabled, ignore to subscribe **********");
@@ -84,30 +85,64 @@ public class PluginSubscriber {
             return;
         }
 
-        LOG.info("********** Version change has been subscribed **********");
+        LOG.info("********** Version updating has been triggered **********");
 
-        if (versionChangedEvent == null) {
-            throw new PluginException("VersionChangedEvent can't be null");
+        if (versionUpdatedEvent == null) {
+            throw new PluginException("VersionUpdatedEvent can't be null");
         }
 
-        VersionChangedEvent.EventType eventType = versionChangedEvent.getEventType();
-        switch (eventType) {
-            case VERSION_UPDATE:
-                String version = versionChangedEvent.getVersion();
-                pluginAdapter.setDynamicVersion(version);
+        String dynamicVersion = versionUpdatedEvent.getDynamicVersion();
+        String localVersion = versionUpdatedEvent.getLocalVersion();
 
-                LOG.info("********** Version has been updated, new version is {} **********", version);
+        if (StringUtils.isEmpty(localVersion)) {
+            pluginAdapter.setDynamicVersion(dynamicVersion);
 
-                break;
-            case VERSION_CLEAR:
-                pluginAdapter.clearDynamicVersion();
+            refreshLoadBalancer();
 
-                LOG.info("********** Version has been cleared **********");
+            LOG.info("********** Version has been updated, new version is {} **********", dynamicVersion);
+        } else {
+            if (StringUtils.equals(pluginAdapter.getLocalVersion(), localVersion)) {
+                pluginAdapter.setDynamicVersion(dynamicVersion);
+
+                refreshLoadBalancer();
 
-                break;
+                LOG.info("********** Version has been updated, new version is {} **********", dynamicVersion);
+            }
         }
+    }
 
-        refreshLoadBalancer();
+    @Subscribe
+    public void onVersionCleared(VersionClearedEvent versionClearedEvent) {
+        Boolean discoveryControlEnabled = pluginContextAware.isDiscoveryControlEnabled();
+        if (!discoveryControlEnabled) {
+            LOG.info("********** Discovery control is disabled, ignore to subscribe **********");
+
+            return;
+        }
+
+        LOG.info("********** Version clearing has been triggered **********");
+
+        if (versionClearedEvent == null) {
+            throw new PluginException("VersionClearedEvent can't be null");
+        }
+
+        String localVersion = versionClearedEvent.getLocalVersion();
+
+        if (StringUtils.isEmpty(localVersion)) {
+            pluginAdapter.clearDynamicVersion();
+
+            refreshLoadBalancer();
+
+            LOG.info("********** Version has been cleared **********");
+        } else {
+            if (StringUtils.equals(pluginAdapter.getLocalVersion(), localVersion)) {
+                pluginAdapter.clearDynamicVersion();
+
+                refreshLoadBalancer();
+
+                LOG.info("********** Version has been cleared **********");
+            }
+        }
     }
 
     private void refreshLoadBalancer() {

discovery-plugin-framework/src/main/java/com/nepxion/discovery/plugin/framework/event/VersionChangedEvent.java → discovery-plugin-framework/src/main/java/com/nepxion/discovery/plugin/framework/event/VersionClearedEvent.java

@@ -13,39 +13,22 @@ import java.io.Serializable;
 
 import org.apache.commons.lang3.StringUtils;
 
-import com.nepxion.discovery.plugin.framework.exception.PluginException;
-
-public class VersionChangedEvent implements Serializable {
+public class VersionClearedEvent implements Serializable {
     private static final long serialVersionUID = 5079797986381461496L;
 
-    public enum EventType {
-        VERSION_UPDATE,
-        VERSION_CLEAR;
-    }
-
-    private EventType eventType;
-    private String version;
+    private String localVersion;
 
-    public VersionChangedEvent(EventType eventType) {
-        this(eventType, null);
+    public VersionClearedEvent() {
+        this(null);
     }
 
-    public VersionChangedEvent(EventType eventType, String version) {
-        if (eventType == EventType.VERSION_UPDATE && StringUtils.isEmpty(version)) {
-            throw new PluginException("Version value can't be null or empty while updating");
+    public VersionClearedEvent(String localVersion) {
+        if (StringUtils.isNotEmpty(localVersion)) {
+            this.localVersion = localVersion.trim();
         }
-
-        this.eventType = eventType;
-        if (StringUtils.isNotEmpty(version)) {
-            this.version = version.trim();
-        }
-    }
-
-    public EventType getEventType() {
-        return eventType;
     }
 
-    public String getVersion() {
-        return version;
+    public String getLocalVersion() {
+        return localVersion;
     }
 }
\ No newline at end of file

discovery-plugin-framework/src/main/java/com/nepxion/discovery/plugin/framework/event/VersionUpdatedEvent.java

+package com.nepxion.discovery.plugin.framework.event;
+
+/**
+ * <p>Title: Nepxion Discovery</p>
+ * <p>Description: Nepxion Discovery</p>
+ * <p>Copyright: Copyright (c) 2017-2050</p>
+ * <p>Company: Nepxion</p>
+ * @author Haojun Ren
+ * @version 1.0
+ */
+
+import java.io.Serializable;
+
+import org.apache.commons.lang3.StringUtils;
+
+import com.nepxion.discovery.plugin.framework.exception.PluginException;
+
+public class VersionUpdatedEvent implements Serializable {
+    private static final long serialVersionUID = 7749946311426379329L;
+
+    private String dynamicVersion;
+    private String localVersion;
+
+    public VersionUpdatedEvent(String dynamicVersion) {
+        this(dynamicVersion, null);
+    }
+
+    public VersionUpdatedEvent(String dynamicVersion, String localVersion) {
+        if (StringUtils.isNotEmpty(dynamicVersion)) {
+            this.dynamicVersion = dynamicVersion.trim();
+        }
+
+        if (StringUtils.isEmpty(this.dynamicVersion)) {
+            throw new PluginException("Dynamic version can't be null or empty while updating");
+        }
+
+        if (StringUtils.isNotEmpty(localVersion)) {
+            this.localVersion = localVersion.trim();
+        }
+    }
+
+    public String getDynamicVersion() {
+        return dynamicVersion;
+    }
+
+    public String getLocalVersion() {
+        return localVersion;
+    }
+}
\ No newline at end of file