net.spy.memcached.protocol.ascii.CollectionDeleteOperationImpl Maven / Gradle / Ivy

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/*
 * 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 net.spy.memcached.KeyUtil;
import net.spy.memcached.collection.BTreeDelete;
import net.spy.memcached.collection.CollectionDelete;
import net.spy.memcached.collection.CollectionResponse;
import net.spy.memcached.collection.ListDelete;
import net.spy.memcached.collection.SetDelete;
import net.spy.memcached.ops.APIType;
import net.spy.memcached.ops.CollectionDeleteOperation;
import net.spy.memcached.ops.CollectionOperationStatus;
import net.spy.memcached.ops.OperationCallback;
import net.spy.memcached.ops.OperationState;
import net.spy.memcached.ops.OperationStatus;
import net.spy.memcached.ops.OperationType;

/**
 * Operation to delete collection data in a memcached server.
 */
public class CollectionDeleteOperationImpl extends OperationImpl
	implements CollectionDeleteOperation {

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

	private static final OperationStatus DELETED = new CollectionOperationStatus(
			true, "DELETED", CollectionResponse.DELETED);
	private static final OperationStatus DELETED_DROPPED = new CollectionOperationStatus(
			true, "DELETED_DROPPED", CollectionResponse.DELETED_DROPPED);
	private static final OperationStatus NOT_FOUND = new CollectionOperationStatus(
			false, "NOT_FOUND", CollectionResponse.NOT_FOUND);
	private static final OperationStatus NOT_FOUND_ELEMENT = new CollectionOperationStatus(
			false, "NOT_FOUND_ELEMENT", CollectionResponse.NOT_FOUND_ELEMENT);
	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 BKEY_MISMATCH = new CollectionOperationStatus(
			false, "BKEY_MISMATCH", CollectionResponse.BKEY_MISMATCH);

	protected String key;
	protected CollectionDelete collectionDelete;

	public CollectionDeleteOperationImpl(String key,
			CollectionDelete collectionDelete, OperationCallback cb) {
		super(cb);
		this.key = key;
		this.collectionDelete = collectionDelete;
		if (this.collectionDelete instanceof ListDelete)
			setAPIType(APIType.LOP_DELETE);
		else if (this.collectionDelete instanceof SetDelete)
			setAPIType(APIType.SOP_DELETE);
		else if (this.collectionDelete instanceof BTreeDelete)
			setAPIType(APIType.BOP_DELETE);
		setOperationType(OperationType.WRITE);
	}

	@Override
	public void handleLine(String line) {
		assert getState() == OperationState.READING
		: "Read ``" + line + "'' when in " + getState() + " state";
		OperationStatus status = matchStatus(line, DELETED, DELETED_DROPPED,
				NOT_FOUND, NOT_FOUND_ELEMENT, OUT_OF_RANGE, TYPE_MISMATCH,
				BKEY_MISMATCH);
		getCallback().receivedStatus(status);
		transitionState(OperationState.COMPLETE);
	}

	@Override
	public void initialize() {
		String cmd = collectionDelete.getCommand();
		String args = collectionDelete.stringify();
		byte[] data = collectionDelete.getData();

		ByteBuffer bb = ByteBuffer.allocate(KeyUtil.getKeyBytes(key).length
				+ cmd.length() + args.length() + data.length + 16);

		setArguments(bb, cmd, key, args);

		if ("sop delete".equals(cmd)) {
			bb.put(data);
			bb.put(CRLF);
		} else if (data.length > 0) {
			bb.put(data);
			bb.put(CRLF);
		}

		bb.flip();
		setBuffer(bb);

		if (getLogger().isDebugEnabled()) {
			getLogger().debug("Request in ascii protocol: "
					+ (new String(bb.array())).replace("\r\n", "\\r\\n"));
		}
	}

	@Override
	protected void wasCancelled() {
		getCallback().receivedStatus(DELETE_CANCELED);
	}

	public Collection getKeys() {
		return Collections.singleton(key);
	}

	public CollectionDelete getDelete() {
		return collectionDelete;
	}

}