netty5/codec-memcache/src/main/java/io/netty/handler/codec/memcache/LastMemcacheContent.java
Michael Nitschinger 20f6f7e018 Implementing the Binary Memcache protocol
This changeset implements the full memcache binary protocol spec, including
a first batch of tests. Ascii protocol and more coverage and helper classes
will follow.
2014-02-13 15:29:38 -08:00

96 lines
2.4 KiB
Java

/*
* Copyright 2013 The Netty Project
*
* The Netty Project 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 io.netty.handler.codec.memcache;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.handler.codec.DecoderResult;
/**
* The {@link MemcacheContent} which signals the end of the content batch.
* <p/>
* Note that by design, even when no content is emitted by the protocol, an
* empty {@link LastMemcacheContent} is issued to make the upstream parsing
* easier.
*/
public interface LastMemcacheContent extends MemcacheContent {
LastMemcacheContent EMPTY_LAST_CONTENT = new LastMemcacheContent() {
@Override
public LastMemcacheContent copy() {
return EMPTY_LAST_CONTENT;
}
@Override
public LastMemcacheContent retain(int increment) {
return this;
}
@Override
public LastMemcacheContent retain() {
return this;
}
@Override
public LastMemcacheContent duplicate() {
return this;
}
@Override
public ByteBuf content() {
return Unpooled.EMPTY_BUFFER;
}
@Override
public DecoderResult getDecoderResult() {
return DecoderResult.SUCCESS;
}
@Override
public void setDecoderResult(DecoderResult result) {
throw new UnsupportedOperationException("read only");
}
@Override
public int refCnt() {
return 1;
}
@Override
public boolean release() {
return false;
}
@Override
public boolean release(int decrement) {
return false;
}
};
@Override
LastMemcacheContent copy();
@Override
LastMemcacheContent retain(int increment);
@Override
LastMemcacheContent retain();
@Override
LastMemcacheContent duplicate();
}