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Java client for Arcus memcached
There is a newer version: 1.14.0
/*
 * arcus-java-client : Arcus Java client
 * Copyright 2010-2014 NAVER Corp.
 *
 * 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 net.spy.memcached.protocol.ascii;

import java.nio.ByteBuffer;
import java.util.Collection;
import java.util.Collections;
import java.util.List;

import net.spy.memcached.collection.CollectionBulkStore;
import net.spy.memcached.collection.CollectionResponse;
import net.spy.memcached.ops.CollectionOperationStatus;
import net.spy.memcached.ops.CollectionBulkStoreOperation;
import net.spy.memcached.ops.OperationCallback;
import net.spy.memcached.ops.OperationState;
import net.spy.memcached.ops.OperationStatus;

/**
 * Operation to store collection data in a memcached server.
 */
public class CollectionBulkStoreOperationImpl extends OperationImpl
	implements CollectionBulkStoreOperation {

	private static final OperationStatus STORE_CANCELED = new CollectionOperationStatus(
			false, "collection canceled", CollectionResponse.CANCELED);

	private static final OperationStatus END = new CollectionOperationStatus(
			true, "END", CollectionResponse.END);
	private static final OperationStatus FAILED_END = new CollectionOperationStatus(
			false, "END", CollectionResponse.END);
	
	private static final OperationStatus CREATED_STORED = new CollectionOperationStatus(
			true, "CREATED_STORED", CollectionResponse.CREATED_STORED);
	private static final OperationStatus STORED = new CollectionOperationStatus(
			true, "STORED", CollectionResponse.STORED);
	private static final OperationStatus NOT_FOUND = new CollectionOperationStatus(
			false, "NOT_FOUND", CollectionResponse.NOT_FOUND);
	private static final OperationStatus ELEMENT_EXISTS = new CollectionOperationStatus(
			false, "ELEMENT_EXISTS", CollectionResponse.ELEMENT_EXISTS);
	private static final OperationStatus OVERFLOWED = new CollectionOperationStatus(
			false, "OVERFLOWED", CollectionResponse.OVERFLOWED);
	private static final OperationStatus OUT_OF_RANGE = new CollectionOperationStatus(
			false, "OUT_OF_RANGE", CollectionResponse.OUT_OF_RANGE);
	private static final OperationStatus TYPE_MISMATCH = new CollectionOperationStatus(
			false, "TYPE_MISMATCH", CollectionResponse.TYPE_MISMATCH);
	private static final OperationStatus LENGTH_MISMATCH = new CollectionOperationStatus(
			false, "LENGTH_MISMATCH", CollectionResponse.LENGTH_MISMATCH);

	protected final String key;
	protected final CollectionBulkStore store;
	protected final CollectionBulkStoreOperation.Callback cb;
	
	protected int count;
	protected int index = 0;
	protected boolean successAll = true;
	
	public CollectionBulkStoreOperationImpl(List keyList,
			CollectionBulkStore store, OperationCallback cb) {
		super(cb);
		this.key = keyList.get(0);
		this.store = store;
		this.cb = (Callback) cb;
	}

	@Override
	public void handleLine(String line) {
		assert getState() == OperationState.READING
			: "Read ``" + line + "'' when in " + getState() + " state";
		if (line.startsWith("END") || store.getItemCount() == 1) {
			cb.receivedStatus((successAll)? END : FAILED_END);
			transitionState(OperationState.COMPLETE);
			return;
		} else if (line.startsWith("RESPONSE ")) {
			getLogger().debug("Got line %s", line);
			
			// TODO server should be fixed
			line = line.replace("   ", " ");
			line = line.replace("  ", " ");
			
			String[] stuff = line.split(" ");
			assert "RESPONSE".equals(stuff[0]);
			count = Integer.parseInt(stuff[1]);
		} else {
			OperationStatus status = matchStatus(line, STORED, CREATED_STORED,
					NOT_FOUND, ELEMENT_EXISTS, OVERFLOWED, OUT_OF_RANGE,
					TYPE_MISMATCH, LENGTH_MISMATCH);
			
			if (!status.isSuccess()) {
				cb.gotStatus(index, status);
				successAll = false;
			}
			
			index++;
		}
	}

	@Override
	public void initialize() {
		ByteBuffer buffer = store.getAsciiCommand();
		setBuffer(buffer);
		
		if (getLogger().isDebugEnabled()) {
			getLogger().debug("Request in ascii protocol: \n" 
					+ (new String(buffer.array())).replaceAll("\\r\\n", "\n"));
		}
	}

	@Override
	protected void wasCancelled() {
		getCallback().receivedStatus(STORE_CANCELED);
	}
	
	public Collection getKeys() {
		return Collections.singleton(key);
	}

	public CollectionBulkStore getStore() {
		return store;
	}
	
}