ShutDownReceivedException.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.tika.pipes.core.protocol;

import java.io.IOException;

/**
 * Thrown when a SHUT_DOWN message is received where an ACK was expected.
 * <p>
 * This allows callers to distinguish a clean shutdown request from other
 * I/O errors and respond with the appropriate lifecycle action (e.g.,
 * {@code System.exit(0)} in PipesServer vs closing only the connection
 * in ConnectionHandler).
 */
public class ShutDownReceivedException extends IOException {

    public ShutDownReceivedException() {
        super("Received SHUT_DOWN while awaiting ACK");
    }
}