com.hazelcast.ascii.memcache.ErrorCommand Maven / Gradle / Ivy
/*
* Copyright (c) 2008-2013, Hazelcast, Inc. 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.
* 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 com.hazelcast.ascii.memcache;
import com.hazelcast.ascii.AbstractTextCommand;
import com.hazelcast.ascii.TextCommandConstants;
import com.hazelcast.nio.IOUtil;
import java.nio.ByteBuffer;
import static com.hazelcast.util.StringUtil.stringToBytes;
public class ErrorCommand extends AbstractTextCommand {
ByteBuffer response;
private final String message;
public ErrorCommand(TextCommandConstants.TextCommandType type) {
this(type, null);
}
public ErrorCommand(TextCommandConstants.TextCommandType type, String message) {
super(type);
byte[] error = TextCommandConstants.ERROR;
if (type == TextCommandConstants.TextCommandType.ERROR_CLIENT) {
error = TextCommandConstants.CLIENT_ERROR;
} else if (type == TextCommandConstants.TextCommandType.ERROR_SERVER) {
error = TextCommandConstants.SERVER_ERROR;
}
this.message = message;
byte[] msg = (message == null) ? null : stringToBytes(message);
int total = error.length;
if (msg != null) {
total += msg.length;
}
total += 2;
response = ByteBuffer.allocate(total);
response.put(error);
if (msg != null) {
response.put(msg);
}
response.put(TextCommandConstants.RETURN);
response.flip();
}
public boolean readFrom(ByteBuffer cb) {
return true;
}
public boolean writeTo(ByteBuffer bb) {
IOUtil.copyToHeapBuffer(response, bb);
return !response.hasRemaining();
}
@Override
public String toString() {
return "ErrorCommand{"
+ "type=" + type
+ ", msg=" + message
+ '}'
+ super.toString();
}
}