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/**
 * 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.xbean.kernel;

/**
 * Signifies that a kernel operation timed out before it could be completed.  The kernel will always leave the
 * system in a stable state before returning to the caller.
 *
 * @author Dain Sundstrom
 * @version $Id$
 * @since 2.0
 */
public class KernelOperationTimoutException extends RuntimeException {
    private final ServiceName serviceName;
    private final String operationName;

    /**
     * Created a KernelOperationTimoutException for the specified operation on the specified service.
     *
     * @param serviceName the name of the service for which the operation timed out
     * @param operationName the name of the operation that timed out
     */
    public KernelOperationTimoutException(ServiceName serviceName, String operationName) {
        super("Kernel operation timed out: serviceName=" + serviceName + ", operationName=" + operationName);
        if (serviceName == null) throw new NullPointerException("serviceName is null");
        if (operationName == null) throw new NullPointerException("operationName is null");
        this.serviceName = serviceName;
        this.operationName = operationName;
    }

    /**
     * Created a KernelOperationTimoutException using the specified custom message.
     *
     * @param message a custom message for this exception
     * @param serviceName the name of the service for which the operation timed out
     * @param operationName the name of the operation that timed out
     */
    public KernelOperationTimoutException(String message, ServiceName serviceName, String operationName) {
        super(message);
        if (serviceName == null) throw new NullPointerException("serviceName is null");
        if (operationName == null) throw new NullPointerException("operationName is null");
        this.serviceName = serviceName;
        this.operationName = operationName;
    }

    /**
     * Gets the name of the service for which the operation timed out.
     *
     * @return the name of the service for which the operation timed out
     */
    public ServiceName getServiceName() {
        return serviceName;
    }

    /**
     * Gets the name of the operation that timed out.
     *
     * @return the name of the operation that timed out
     */
    public String getOperationName() {
        return operationName;
    }
}