com.continuuity.weave.internal.zookeeper.RetryUtils.java Source code

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Here is the source code for com.continuuity.weave.internal.zookeeper.RetryUtils.java

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/**
 * Copyright 2012-2013 Continuuity,Inc. All Rights Reserved.
 *
 * 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.continuuity.weave.internal.zookeeper;

import org.apache.zookeeper.KeeperException;

/**
 * Utility class for help determining operation retry condition.
 */
final class RetryUtils {

    /**
     * Tells if a given operation error code can be retried or not.
     * @param code The error code of the operation.
     * @return {@code true} if the operation can be retried.
     */
    public static boolean canRetry(KeeperException.Code code) {
        return (code == KeeperException.Code.CONNECTIONLOSS || code == KeeperException.Code.OPERATIONTIMEOUT
                || code == KeeperException.Code.SESSIONEXPIRED || code == KeeperException.Code.SESSIONMOVED);
    }

    /**
     * Tells if a given operation exception can be retried or not.
     * @param t The exception raised by an operation.
     * @return {@code true} if the operation can be retried.
     */
    public static boolean canRetry(Throwable t) {
        return t instanceof KeeperException && canRetry(((KeeperException) t).code());
    }

    private RetryUtils() {
    }
}