/*
*
* 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.server.flow;


public interface FlowCreditManager
{
    public static interface FlowCreditManagerListener
    {
        void creditStateChanged(boolean hasCredit);
    }

    void addStateListener(FlowCreditManagerListener listener);

    boolean removeListener(FlowCreditManagerListener listener);

    public void restoreCredit(long messageCredit, long bytesCredit);

    public boolean hasCredit();

    public boolean useCreditForMessage(long msgSize);

}