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INT-3617: ZK Leader Event Processing
JIRA: https://jira.spring.io/browse/INT-3617 Start/stop `SmartLifecyle` beans with leader election/revocation. ZK Namespace Support Add Annotation Support INT-3617: Polishing Add `SmartLifecycle` to listener parser. INT-3617: Polishing; PR Comments Revert SmartLifecycleRoleController Remove reflection. Remove Dependence on spring-cloud-cluster Temporarily move the relevant classes here. Polishing; PR Comments and Fix Test Test was incorrectly stopping the LeaderInitiator before it was elected. Set auto-startup="false" in the i-c-a so we wait for its start before stopping the LeaderInitiator. Fix JavaDocs
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spring-integration-core/src/main/java/org/springframework/integration/annotation/Role.java
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| /* | ||
| * Copyright 2002-2015 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 | ||
| * | ||
| * 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. | ||
| */ | ||
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| package org.springframework.integration.annotation; | ||
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| import java.lang.annotation.Documented; | ||
| import java.lang.annotation.ElementType; | ||
| import java.lang.annotation.Inherited; | ||
| import java.lang.annotation.Retention; | ||
| import java.lang.annotation.RetentionPolicy; | ||
| import java.lang.annotation.Target; | ||
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| /** | ||
| * Annotate endpoints to assign them to a role. Such endpoints can be started/stopped as | ||
| * a group. See {@code SmartLifecycleRoleController}. | ||
| * | ||
| * @author Gary Russell | ||
| * @since 4.2 | ||
| */ | ||
| @Target({ElementType.METHOD, ElementType.ANNOTATION_TYPE}) | ||
| @Retention(RetentionPolicy.RUNTIME) | ||
| @Inherited | ||
| @Documented | ||
| public @interface Role { | ||
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| /** | ||
| * @return the role for this endpoint. See {@code SmartLifecycleRoleController}. | ||
| */ | ||
| String value() default ""; | ||
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| } |
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70
...egration-core/src/main/java/org/springframework/integration/leader/AbstractCandidate.java
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| /* | ||
| * Copyright 2015 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 | ||
| * | ||
| * 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.springframework.integration.leader; | ||
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| import java.util.UUID; | ||
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| import org.springframework.util.StringUtils; | ||
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| /** | ||
| * Base implementation of a {@link Candidate}. | ||
| * | ||
| * @author Janne Valkealahti | ||
| * | ||
| */ | ||
| public abstract class AbstractCandidate implements Candidate { | ||
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| private static final String DEFAULT_ROLE = "leader"; | ||
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| private final String id; | ||
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| private final String role; | ||
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| /** | ||
| * Instantiate a abstract candidate. | ||
| */ | ||
| public AbstractCandidate() { | ||
| this(null, null); | ||
| } | ||
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| /** | ||
| * Instantiate a abstract candidate. | ||
| * | ||
| * @param id the identifier | ||
| * @param role the role | ||
| */ | ||
| public AbstractCandidate(String id, String role) { | ||
| this.id = StringUtils.hasText(id) ? id : UUID.randomUUID().toString(); | ||
| this.role = StringUtils.hasText(role) ? role : DEFAULT_ROLE; | ||
| } | ||
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| @Override | ||
| public String getRole() { | ||
| return this.role; | ||
| } | ||
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| @Override | ||
| public String getId() { | ||
| return this.id; | ||
| } | ||
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| @Override | ||
| public abstract void onGranted(Context ctx) throws InterruptedException; | ||
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| @Override | ||
| public abstract void onRevoked(Context ctx); | ||
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| } |
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