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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.bookkeeper.metastore;
import java.util.EnumSet;
import java.util.HashMap;
import java.util.Map;
/**
* Marker for metastore exceptions.
*/
@SuppressWarnings("serial")
public abstract class MSException extends Exception {
/**
* Return codes.
*/
public enum Code {
OK (0, "OK"),
BadVersion (-1, "Version conflict"),
NoKey (-2, "Key does not exist"),
KeyExists (-3, "Key exists"),
NoEntries (-4, "No entries found"),
InterruptedException (-100, "Operation interrupted"),
IllegalOp (-101, "Illegal operation"),
ServiceDown (-102, "Metadata service is down"),
OperationFailure(-103, "Operaion failed on metadata storage server side");
private static final Map codes = new HashMap();
static {
for (Code c : EnumSet.allOf(Code.class)) {
codes.put(c.code, c);
}
}
private final int code;
private final String description;
private Code(int code, String description) {
this.code = code;
this.description = description;
}
/**
* Get the int value for a particular Code.
*
* @return error code as integer
*/
public int getCode() {
return code;
}
/**
* Get the description for a particular Code.
*
* @return error description
*/
public String getDescription() {
return description;
}
/**
* Get the Code value for a particular integer error code.
*
* @param code int error code
* @return Code value corresponding to specified int code, or null.
*/
public static Code get(int code) {
return codes.get(code);
}
}
private final Code code;
MSException(Code code, String errMsg) {
super(code.getDescription() + " : " + errMsg);
this.code = code;
}
MSException(Code code, String errMsg, Throwable cause) {
super(code.getDescription() + " : " + errMsg, cause);
this.code = code;
}
public Code getCode() {
return this.code;
}
public static MSException create(Code code) {
return create(code, "", null);
}
public static MSException create(Code code, String errMsg) {
return create(code, errMsg, null);
}
public static MSException create(Code code, String errMsg, Throwable cause) {
switch (code) {
case BadVersion:
return new BadVersionException(errMsg, cause);
case NoKey:
return new NoKeyException(errMsg, cause);
case KeyExists:
return new KeyExistsException(errMsg, cause);
case InterruptedException:
return new MSInterruptedException(errMsg, cause);
case IllegalOp:
return new IllegalOpException(errMsg, cause);
case ServiceDown:
return new ServiceDownException(errMsg, cause);
case OperationFailure:
return new OperationFailureException(errMsg, cause);
case OK:
default:
throw new IllegalArgumentException("Invalid exception code");
}
}
/**
* A BadVersion exception.
*/
public static class BadVersionException extends MSException {
public BadVersionException(String errMsg) {
super(Code.BadVersion, errMsg);
}
public BadVersionException(String errMsg, Throwable cause) {
super(Code.BadVersion, errMsg, cause);
}
}
/**
* Exception in cases where there is no key.
*/
public static class NoKeyException extends MSException {
public NoKeyException(String errMsg) {
super(Code.NoKey, errMsg);
}
public NoKeyException(String errMsg, Throwable cause) {
super(Code.NoKey, errMsg, cause);
}
}
/**
* Exception would be thrown in a cursor if no entries found.
*/
public static class NoEntriesException extends MSException {
public NoEntriesException(String errMsg) {
super(Code.NoEntries, errMsg);
}
public NoEntriesException(String errMsg, Throwable cause) {
super(Code.NoEntries, errMsg, cause);
}
}
/**
* Key Exists Exception.
*/
public static class KeyExistsException extends MSException {
public KeyExistsException(String errMsg) {
super(Code.KeyExists, errMsg);
}
public KeyExistsException(String errMsg, Throwable cause) {
super(Code.KeyExists, errMsg, cause);
}
}
/**
* Metastore interruption exception.
*/
public static class MSInterruptedException extends MSException {
public MSInterruptedException(String errMsg) {
super(Code.InterruptedException, errMsg);
}
public MSInterruptedException(String errMsg, Throwable cause) {
super(Code.InterruptedException, errMsg, cause);
}
}
/**
* Illegal operation exception.
*/
public static class IllegalOpException extends MSException {
public IllegalOpException(String errMsg) {
super(Code.IllegalOp, errMsg);
}
public IllegalOpException(String errMsg, Throwable cause) {
super(Code.IllegalOp, errMsg, cause);
}
}
/**
* Service down exception.
*/
public static class ServiceDownException extends MSException {
public ServiceDownException(String errMsg) {
super(Code.ServiceDown, errMsg);
}
public ServiceDownException(String errMsg, Throwable cause) {
super(Code.ServiceDown, errMsg, cause);
}
}
/**
* Operation failure exception.
*/
public static class OperationFailureException extends MSException {
public OperationFailureException(String errMsg) {
super(Code.OperationFailure, errMsg);
}
public OperationFailureException(String errMsg, Throwable cause) {
super(Code.OperationFailure, errMsg, cause);
}
}
}
