/*
 *
 * 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.qpid.jms.failover;

import org.apache.qpid.jms.BrokerDetails;

public interface FailoverMethod
{
    public static final String SINGLE_BROKER = "singlebroker";
    public static final String ROUND_ROBIN = "roundrobin";
    public static final String FAILOVER_EXCHANGE= "failover_exchange";
    public static final String RANDOM = "random";
    /**
     * Reset the Failover to initial conditions
     */
    void reset();

    /**
     *  Check if failover is possible for this method
     *
     * @return true if failover is allowed
     */
    boolean failoverAllowed();

    /**
     * Notification to the Failover method that a connection has been attained.
     */
    void attainedConnection();

    /**
     * If there is no current BrokerDetails the null will be returned.
     * @return The current BrokerDetail value to use
     */
    BrokerDetails getCurrentBrokerDetails();

    /**
     *  Move to the next BrokerDetails if one is available.
     * @return the next BrokerDetail or null if there is none.
     */
    BrokerDetails getNextBrokerDetails();

    /**
     * Set the currently active broker to be the new value.
     * @param broker The new BrokerDetail value
     */
    void setBroker(BrokerDetails broker);

    /**
     * Set the retries for this method
     * @param maxRetries the maximum number of time to retry this Method
     */
    void setRetries(int maxRetries);

    /**
     * @return The name of this method for display purposes.
     */
    String methodName();
}
