com.opensearchserver.hadse.index.shard.ShardItem.java Source code

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Here is the source code for com.opensearchserver.hadse.index.shard.ShardItem.java

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/** Copyright 2014 OpenSearchServer, Inc.
 * http://www.opensearchserver.com
 *
 * 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 com.opensearchserver.hadse.index.shard;

import java.io.Closeable;
import java.io.File;

import com.fasterxml.jackson.annotation.JsonInclude;
import com.fasterxml.jackson.annotation.JsonInclude.Include;
import com.opensearchserver.hadse.Hadse;
import com.opensearchserver.hadse.cluster.ClusterCatalog;
import com.opensearchserver.hadse.utils.ReadWriteLock;

@JsonInclude(Include.NON_EMPTY)
public abstract class ShardItem implements Closeable {

    /**
     * The location of the directory or file
     */
    protected final ShardDef shardDef;
    private Status status = Status.OFFLINE;
    private String error = null;

    protected ShardItem(ShardDef shardDef) {
        this.shardDef = shardDef;
    }

    final public String getName() {
        return shardDef.getName();
    }

    final public Status getStatus() {
        statusLock.r.lock();
        try {
            return status;
        } finally {
            statusLock.r.unlock();
        }
    }

    public String getAddress() {
        return shardDef.getAddress();
    }

    final public String getError() {
        statusLock.r.lock();
        try {
            return error;
        } finally {
            statusLock.r.unlock();
        }
    }

    private final ReadWriteLock statusLock = new ReadWriteLock();

    final protected void setStatus(Status status, String error) {
        statusLock.w.lock();
        try {
            this.status = status;
            this.error = error;
        } finally {
            statusLock.w.unlock();
        }
        if (error != null)
            Hadse.LOG.error(error);
    }

    public static ShardItem load(ShardDef shardDef, File indexDirectory) {
        if (ClusterCatalog.isLocal(shardDef.getAddress()))
            return new LocalShardItem(shardDef, indexDirectory);
        // TODO RemoteShardItem
        return null;
    }

    public enum Status {
        ONLINE, OFFLINE, ERROR;
    }
}