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java sdk for qcloud cos
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/*
 * Copyright 2010-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License").
 * You may not use this file except in compliance with the License.
 * A copy of the License is located at
 *
 *  http://aws.amazon.com/apache2.0
 *
 * or in the "license" file accompanying this file. This file 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.

 * According to cos feature, we modify some class，comment, field name, etc.
 */


package com.qcloud.cos.exception;

/**
 * Base exception class for any errors that occur while attempting to use an COS
 * client from COS SDK for Java to make service calls to Tencent Qcloud Cos.
 *
 * Error responses from services will be handled as CosServiceExceptions.
 * This class is primarily for errors that occur when unable to get a response
 * from a service, or when the client is unable to parse the response from a
 * service. For example, if a caller tries to use a client to make a service
 * call, but no network connection is present, an CosClientException will be
 * thrown to indicate that the client wasn't able to successfully make the
 * service call, and no information from the service is available.
 *
 * Note : If the SDK is able to parse the response; but doesn't recognize the
 * error code from the service, an CosServiceException is thrown
 *
 * Callers should typically deal with exceptions through CosServiceException,
 * which represent error responses returned by services. CosServiceException
 * has much more information available for callers to appropriately deal with
 * different types of errors that can occur.
 *
 * @see CosServiceException
 */

public class CosClientException extends RuntimeException {

    private static final long serialVersionUID = 1L;
    private String errorCode = ClientExceptionConstants.UNKNOWN;

    /**
     * Creates a new CosClientException with the specified message, and root
     * cause.
     *
     * @param message An error message describing why this exception was thrown.
     * @param t The underlying cause of this exception.
     */
    public CosClientException(String message, Throwable t) {
        super(message, t);
    }

    public CosClientException(String message, String errorCode, Throwable t) {
        super(message, t);
        this.errorCode = errorCode;
    }

    /**
     * Creates a new CosClientException with the specified message.
     *
     * @param message An error message describing why this exception was thrown.
     */
    public CosClientException(String message) {
        super(message);
    }

    public CosClientException(Throwable t) {
        super(t);
    }

    public String getErrorCode() {
        return errorCode;
    }

    public void setErrorCode(String errorCode) {
        this.errorCode = errorCode;
    }

    /**
     * Returns a hint as to whether it makes sense to retry upon this exception.
     * Default is true, but subclass may override.
     */
    public boolean isRetryable() {
        return true;
    }

    public boolean isRequestTimeout() {
        return errorCode == ClientExceptionConstants.REQUEST_TIMEOUT;
    }

    public String toString() {
        String causeName = (getCause() == null) ? "null" : getCause().getClass().getName();
        return super.toString() + ". errCode:" + getErrorCode() + ",causeExp:" + causeName;
    }
}