/*
* (C) 2007-2012 Alibaba Group Holding Limited.
*
* 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.
* Authors:
* dogun (yuexuqiang at gmail.com)
*/
package com.taobao.common.store.memory;
import java.io.IOException;
import java.util.Iterator;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import com.taobao.common.store.Store;
import com.taobao.common.store.util.BytesKey;
/**
*
*
* @author dogun (yuexuqiang at gmail.com)
*
*/
public class MemStore implements Store {
private final Map<BytesKey, byte[]> datas = new ConcurrentHashMap<BytesKey, byte[]>();
/*
* (non-Javadoc)
*
* @see com.taobao.common.store.Store#add(byte[], byte[])
*/
@Override
public void add(final byte[] key, final byte[] data) throws IOException {
this.datas.put(new BytesKey(key), data);
}
@Override
public void add(final byte[] key, final byte[] data, final boolean force) throws IOException {
this.datas.put(new BytesKey(key), data);
}
@Override
public boolean remove(final byte[] key, final boolean force) throws IOException {
return null != this.datas.remove(new BytesKey(key));
}
/*
* (non-Javadoc)
*
* @see com.taobao.common.store.Store#get(byte[])
*/
@Override
public byte[] get(final byte[] key) throws IOException {
return this.datas.get(new BytesKey(key));
}
/*
* (non-Javadoc)
*
* @see com.taobao.common.store.Store#iterator()
*/
@Override
public Iterator<byte[]> iterator() throws IOException {
final Iterator<BytesKey> it = this.datas.keySet().iterator();
return new Iterator<byte[]>() {
@Override
public boolean hasNext() {
return it.hasNext();
}
@Override
public byte[] next() {
final BytesKey key = it.next();
if (null == key) {
return null;
}
return key.getData();
}
@Override
public void remove() {
it.remove();
}
};
}
/*
* (non-Javadoc)
*
* @see com.taobao.common.store.Store#remove(byte[])
*/
@Override
public boolean remove(final byte[] key) throws IOException {
return null != this.datas.remove(new BytesKey(key));
}
/*
* (non-Javadoc)
*
* @see com.taobao.common.store.Store#size()
*/
@Override
public int size() {
return this.datas.size();
}
/*
* (non-Javadoc)
*
* @see com.taobao.common.store.Store#update(byte[], byte[])
*/
@Override
public boolean update(final byte[] key, final byte[] data) throws IOException {
this.datas.put(new BytesKey(key), data);
return true;
}
@Override
public void close() throws IOException {
// nodo
}
@Override
public long getMaxFileCount() {
return Long.MAX_VALUE;
}
@Override
public void setMaxFileCount(final long maxFileCount) {
}
}