Example usage for org.springframework.integration.leader DefaultCandidate DefaultCandidate

Introduction

In this page you can find the example usage for org.springframework.integration.leader DefaultCandidate DefaultCandidate.

Prototype

public DefaultCandidate(String id, String role) 

Source Link

Document

Instantiate a default candidate.

Usage

From source file:org.springframework.cloud.task.configuration.SingleInstanceTaskListener.java

@BeforeTask
public void lockTask(TaskExecution taskExecution) {
    if (this.lockRegistry == null) {
        this.lockRegistry = getDefaultLockRegistry(taskExecution.getExecutionId());
    }/* w  w  w.  j a v a 2s. c  o m*/
    this.lockRegistryLeaderInitiator = new LockRegistryLeaderInitiator(this.lockRegistry, new DefaultCandidate(
            String.valueOf(taskExecution.getExecutionId()), taskNameResolver.getTaskName()));
    this.lockRegistryLeaderInitiator.setApplicationEventPublisher(this.applicationEventPublisher);
    this.lockRegistryLeaderInitiator.setPublishFailedEvents(true);
    this.lockRegistryLeaderInitiator.start();
    while (!this.lockReady) {
        try {
            Thread.sleep(this.taskProperties.getSingleInstanceLockCheckInterval());
        } catch (InterruptedException ex) {
            logger.warn("Thread Sleep Failed", ex);
        }
        if (this.lockFailed) {
            String errorMessage = String.format("Task with name \"%s\" is already running.",
                    this.taskNameResolver.getTaskName());
            try {
                this.lockRegistryLeaderInitiator.destroy();
            } catch (Exception exception) {
                throw new TaskExecutionException("Failed to destroy lock.", exception);
            }
            throw new TaskExecutionException(errorMessage);
        }
    }
}

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