Example usage for com.amazonaws.services.ecs AmazonECS describeTaskDefinition

Introduction

In this page you can find the example usage for com.amazonaws.services.ecs AmazonECS describeTaskDefinition.

Prototype

DescribeTaskDefinitionResult describeTaskDefinition(
        DescribeTaskDefinitionRequest describeTaskDefinitionRequest);

Source Link

Document

Describes a task definition.

Usage

From source file:com.netflix.spinnaker.clouddriver.ecs.provider.agent.TaskDefinitionCachingAgent.java

License:Apache License

@Override
protected List<TaskDefinition> getItems(AmazonECS ecs, ProviderCache providerCache) {
    List<TaskDefinition> taskDefinitionList = new LinkedList<>();
    Set<String> cachedArns = providerCache.getIdentifiers(TASK_DEFINITIONS.toString()).stream()
            .filter(id -> keyAccountRegionFilter(TASK_DEFINITIONS.toString(), id)).map(id -> {
                Map<String, String> keyParts = Keys.parse(id);
                return keyParts.get("taskDefinitionArn");
            }).collect(Collectors.toSet());

    String nextToken = null;/*from   w ww  .  j a v  a  2  s  .  c  om*/
    do {
        ListTaskDefinitionsRequest listTasksRequest = new ListTaskDefinitionsRequest();
        if (nextToken != null) {
            listTasksRequest.setNextToken(nextToken);
        }
        ListTaskDefinitionsResult listTaskDefinitionsResult = ecs.listTaskDefinitions(listTasksRequest);
        List<String> taskDefinitionArns = listTaskDefinitionsResult.getTaskDefinitionArns();

        if (taskDefinitionArns.size() == 0) {
            continue;
        }

        Set<String> newTaskDefArns = new HashSet<>(taskDefinitionArns);
        newTaskDefArns.removeAll(cachedArns);

        Set<String> existingTaskDefArns = new HashSet<>(taskDefinitionArns);
        existingTaskDefArns.removeAll(newTaskDefArns);

        if (!existingTaskDefArns.isEmpty()) {
            // TaskDefinitions are immutable, there's no reason to make a describe call on existing ones.
            taskDefinitionList.addAll(retrieveFromCache(existingTaskDefArns, providerCache));
        }

        for (String taskDefinitionArn : newTaskDefArns) {
            TaskDefinition taskDefinition = ecs
                    .describeTaskDefinition(
                            new DescribeTaskDefinitionRequest().withTaskDefinition(taskDefinitionArn))
                    .getTaskDefinition();
            taskDefinitionList.add(taskDefinition);
        }

        nextToken = listTaskDefinitionsResult.getNextToken();
    } while (nextToken != null && nextToken.length() != 0);
    return taskDefinitionList;
}

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