Introduce the MemberDepartedEvent class extending MembershipEvent to signal when a peer member departs from the distributed system (cluster).

2020-04-27 14:27:45 -07:00
parent afb853646f
commit 0f1dbc175d
2 changed files with 150 additions and 0 deletions
--- a/apache-geode-extensions/src/main/java/org/springframework/geode/distributed/event/support/MemberDepartedEvent.java
+++ b/apache-geode-extensions/src/main/java/org/springframework/geode/distributed/event/support/MemberDepartedEvent.java
@@ -0,0 +1,81 @@
+/*
+ * Copyright 2020 the original author or authors.
+ *
+ * Licensed 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
+ *
+ *     https://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.springframework.geode.distributed.event.support;
+
+import org.apache.geode.distributed.DistributedMember;
+import org.apache.geode.distributed.DistributedSystem;
+import org.apache.geode.distributed.internal.DistributionManager;
+
+import org.springframework.geode.distributed.event.MembershipEvent;
+
+/**
+ * {@link MembershipEvent} fired when a {@link DistributedMember} departs from the {@link DistributedSystem}.
+ *
+ * @author John Blum
+ * @see org.apache.geode.distributed.DistributedMember
+ * @see org.apache.geode.distributed.DistributedSystem
+ * @see org.springframework.geode.distributed.event.MembershipEvent
+ * @since 1.3.0
+ */
+public class MemberDepartedEvent extends MembershipEvent<MemberDepartedEvent> {
+
+	private boolean crashed = false;
+
+	/**
+	 * Constructs a new instance of {@link MemberDepartedEvent} initialized with the given {@link DistributionManager}.
+	 *
+	 * @param distributionManager {@link DistributionManager} used as the {@link #getSource() source} of this event;
+	 * must not be {@literal null}.
+	 * @throws IllegalArgumentException if {@link DistributionManager} is {@literal null}.
+	 * @see org.apache.geode.distributed.internal.DistributionManager
+	 */
+	public MemberDepartedEvent(DistributionManager distributionManager) {
+		super(distributionManager);
+	}
+
+	/**
+	 * Determines whether the peer member crashed when it departed from the {@link DistributedSystem} (cluster).
+	 *
+	 * @return a boolean value indicating whether the peer member crashed when it departed
+	 * from the {@link DistributedSystem} (cluster).
+	 */
+	public boolean isCrashed() {
+		return this.crashed;
+	}
+
+	/**
+	 * Builder method used to configure the {@link #isCrashed()} property indicating whether the peer member crashed
+	 * when it departed from the {@link DistributedSystem}.
+	 *
+	 * @param crashed boolean value indicating whether the peer member crashed.
+	 * @return this {@link MemberDepartedEvent}.
+	 * @see #isCrashed()
+	 */
+	public MemberDepartedEvent crashed(boolean crashed) {
+
+		this.crashed = crashed;
+
+		return this;
+	}
+
+	/**
+	 * @inheritDoc
+	 */
+	@Override
+	public final Type getType() {
+		return Type.MEMBER_DEPARTED;
+	}
+}