jp.classmethod.aws.gradle.rds.AmazonRDSDescribeInstanceTask.java Source code

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Here is the source code for jp.classmethod.aws.gradle.rds.AmazonRDSDescribeInstanceTask.java

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/*
 * Copyright 2015-2016 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 jp.classmethod.aws.gradle.rds;

import java.util.Arrays;
import java.util.List;

import lombok.Getter;
import lombok.Setter;

import org.gradle.api.GradleException;
import org.gradle.api.internal.ConventionTask;
import org.gradle.api.tasks.TaskAction;

import com.amazonaws.AmazonServiceException;
import com.amazonaws.services.rds.AmazonRDS;
import com.amazonaws.services.rds.model.DBInstance;
import com.amazonaws.services.rds.model.DBInstanceNotFoundException;
import com.amazonaws.services.rds.model.DescribeDBInstancesRequest;
import com.amazonaws.services.rds.model.DescribeDBInstancesResult;

public class AmazonRDSDescribeInstanceTask extends ConventionTask { // NOPMD

    @Getter
    @Setter
    private String dbInstanceIdentifier;

    @Getter
    @Setter
    private List<String> successStatuses = Arrays.asList("available", "backing-up", "terminated");

    @Getter
    @Setter
    private List<String> waitStatuses = Arrays.asList("creating", "deleting", "modifying", "rebooting", "renaming",
            "resetting-master-credentials");

    @Getter
    @Setter
    private int loopTimeout = 900; // sec

    @Getter
    @Setter
    private int loopWait = 10; // sec

    @Getter
    private boolean found;

    @Getter
    private String lastStatus;

    @Getter
    private DBInstance dbInstance;

    public AmazonRDSDescribeInstanceTask() {
        setDescription("Wait RDS instance for specific status.");
        setGroup("AWS");
    }

    @TaskAction
    public void waitInstanceForStatus() { // NOPMD
        // to enable conventionMappings feature
        String dbInstanceIdentifier = getDbInstanceIdentifier();
        List<String> successStatuses = getSuccessStatuses();
        List<String> waitStatuses = getWaitStatuses();
        int loopTimeout = getLoopTimeout();
        int loopWait = getLoopWait();

        if (dbInstanceIdentifier == null) {
            throw new GradleException("dbInstanceIdentifier is not specified");
        }

        AmazonRDSPluginExtension ext = getProject().getExtensions().getByType(AmazonRDSPluginExtension.class);
        AmazonRDS rds = ext.getClient();

        long start = System.currentTimeMillis();
        while (true) {
            if (System.currentTimeMillis() > start + (loopTimeout * 1000)) {
                throw new GradleException("Timeout");
            }
            try {
                DescribeDBInstancesResult dir = rds.describeDBInstances(
                        new DescribeDBInstancesRequest().withDBInstanceIdentifier(dbInstanceIdentifier));
                dbInstance = dir.getDBInstances().get(0);
                found = true;
                lastStatus = dbInstance.getDBInstanceStatus();
                if (successStatuses.contains(lastStatus)) {
                    getLogger().info("Description of DB instance {} is now {}.", dbInstanceIdentifier, lastStatus);
                    break;
                } else if (waitStatuses.contains(lastStatus)) {
                    getLogger().info("Description of DB instance {} is {}...", dbInstanceIdentifier, lastStatus);
                    try {
                        Thread.sleep(loopWait * 1000);
                    } catch (InterruptedException e) {
                        throw new GradleException("Sleep interrupted", e);
                    }
                } else {
                    // fail when current status is not waitStatuses or successStatuses
                    throw new GradleException("Status of " + dbInstanceIdentifier + " is " + lastStatus
                            + ".  It seems to be failed.");
                }
            } catch (DBInstanceNotFoundException e) {
                throw new GradleException(dbInstanceIdentifier + " is not exists", e);
            } catch (AmazonServiceException e) {
                if (found) {
                    break;
                } else {
                    throw new GradleException("Fail to describe instance: " + dbInstanceIdentifier, e);
                }
            }
        }
    }
}