trunk/activemq-core/src/main/java/org/apache/activemq/store/amq/RecoveryListenerAdapter.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.activemq.store.amq;

import org.apache.activemq.command.Message;
import org.apache.activemq.command.MessageId;
import org.apache.activemq.store.MessageRecoveryListener;
import org.apache.activemq.store.MessageStore;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

final class RecoveryListenerAdapter implements MessageRecoveryListener {

    private static final Logger LOG = LoggerFactory.getLogger(RecoveryListenerAdapter.class);
    private final MessageStore store;
    private final MessageRecoveryListener listener;
    private int count;
    private MessageId lastRecovered;

    RecoveryListenerAdapter(MessageStore store, MessageRecoveryListener listener) {
        this.store = store;
        this.listener = listener;
    }

    public boolean hasSpace() {
        return listener.hasSpace();
    }

    public boolean isDuplicate(MessageId id) {
        return listener.isDuplicate(id);
    }
    
    public boolean recoverMessage(Message message) throws Exception {
        if (listener.hasSpace()) {
            if (listener.recoverMessage(message)) {
                lastRecovered = message.getMessageId();
                count++;
                return true;
            }
        }
        return false;
    }

    public boolean recoverMessageReference(MessageId ref) throws Exception {
        Message message = this.store.getMessage(ref);
        if (message != null) {
            return recoverMessage(message);
        } else {
            throw new IllegalStateException("Message id " + ref + " could not be recovered from the data store for: " + store.getDestination().getQualifiedName() 
                    + " - already dispatched");
        }
    }

    MessageId getLastRecoveredMessageId() {
        return lastRecovered;
    }

    int size() {
        return count;
    }

    void reset() {
        count = 0;
    }
}