modules/core/src/main/java/org/apache/ignite/internal/management/ClusterChangeTagTask.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.apache.ignite.internal.management;

import org.apache.ignite.IgniteCheckedException;
import org.apache.ignite.IgniteException;
import org.apache.ignite.internal.cluster.IgniteClusterEx;
import org.apache.ignite.internal.processors.task.GridInternal;
import org.apache.ignite.internal.processors.task.GridVisorManagementTask;
import org.apache.ignite.internal.visor.VisorJob;
import org.apache.ignite.internal.visor.VisorOneNodeTask;

/**
 *
 */
@GridInternal
@GridVisorManagementTask
public class ClusterChangeTagTask extends VisorOneNodeTask<ChangeTagCommandArg, ClusterChangeTagTaskResult> {
    /** */
    private static final long serialVersionUID = 0L;

    /** {@inheritDoc} */
    @Override protected VisorJob<ChangeTagCommandArg, ClusterChangeTagTaskResult> job(
        ChangeTagCommandArg arg) {
        return new ClusterChangeTagJob(arg, debug);
    }

    /** */
    private static class ClusterChangeTagJob extends VisorJob<ChangeTagCommandArg, ClusterChangeTagTaskResult> {
        /** */
        private static final long serialVersionUID = 0L;

        /**
         * Create job with specified argument.
         *
         * @param arg Job argument.
         * @param debug Flag indicating whether debug information should be printed into node log.
         */
        ClusterChangeTagJob(
            ChangeTagCommandArg arg, boolean debug) {
            super(arg, debug);
        }

        /** {@inheritDoc} */
        @Override protected ClusterChangeTagTaskResult run(
            ChangeTagCommandArg arg
        ) throws IgniteException {
            return update(arg.newTagValue());
        }

        /**
         * @param newTag New tag.
         */
        private ClusterChangeTagTaskResult update(String newTag) {
            IgniteClusterEx cl = ignite.cluster();

            boolean success = false;
            String errMsg = null;

            String oldTag = cl.tag();

            try {
                cl.tag(newTag);

                success = true;
            }
            catch (IgniteCheckedException e) {
                errMsg = e.getMessage();
            }

            return new ClusterChangeTagTaskResult(oldTag, Boolean.valueOf(success), errMsg);
        }
    }
}