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Java client for Arcus memcached
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/*
 * arcus-java-client : Arcus Java client
 * Copyright 2010-2014 NAVER Corp.
 * Copyright 2014-2021 JaM2in Co., Ltd.
 *
 * 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.Buffer;
import java.nio.ByteBuffer;
import java.util.Collection;
import java.util.Collections;

import net.spy.memcached.KeyUtil;
import net.spy.memcached.collection.BTreeCreate;
import net.spy.memcached.collection.CollectionCreate;
import net.spy.memcached.collection.CollectionResponse;
import net.spy.memcached.collection.ListCreate;
import net.spy.memcached.collection.SetCreate;
import net.spy.memcached.collection.MapCreate;
import net.spy.memcached.ops.APIType;
import net.spy.memcached.ops.CollectionCreateOperation;
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 create empty collection in a memcached server.
 */
public class CollectionCreateOperationImpl extends OperationImpl
        implements CollectionCreateOperation {

  private static final int OVERHEAD = 32;

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

  private static final OperationStatus CREATED = new CollectionOperationStatus(
          true, "CREATED", CollectionResponse.CREATED);
  private static final OperationStatus EXISTS = new CollectionOperationStatus(
          false, "EXISTS", CollectionResponse.EXISTS);
  private static final OperationStatus SERVER_ERROR = new CollectionOperationStatus(
          false, "SERVER_ERROR", CollectionResponse.SERVER_ERROR);

  protected final String key;
  protected final CollectionCreate collectionCreate;

  public CollectionCreateOperationImpl(String key,
                                       CollectionCreate collectionCreate, OperationCallback cb) {
    super(cb);
    this.key = key;
    this.collectionCreate = collectionCreate;
    if (this.collectionCreate instanceof ListCreate) {
      setAPIType(APIType.LOP_CREATE);
    } else if (this.collectionCreate instanceof SetCreate) {
      setAPIType(APIType.SOP_CREATE);
    } else if (this.collectionCreate instanceof BTreeCreate) {
      setAPIType(APIType.BOP_CREATE);
    } else if (this.collectionCreate instanceof MapCreate) {
      setAPIType(APIType.MOP_CREATE);
    }
    setOperationType(OperationType.WRITE);
  }

  @Override
  public void handleLine(String line) {
    assert getState() == OperationState.READING
            : "Read ``" + line + "'' when in " + getState() + " state";
    /* ENABLE_REPLICATION if */
    if (line.equals("SWITCHOVER") || line.equals("REPL_SLAVE")) {
      receivedMoveOperations(line);
      return;
    }
    /* ENABLE_REPLICATION end */
    getCallback().receivedStatus(matchStatus(line, CREATED, EXISTS, SERVER_ERROR));
    transitionState(OperationState.COMPLETE);
  }

  @Override
  public void initialize() {
    String args = collectionCreate.stringify();
    ByteBuffer bb = ByteBuffer.allocate(KeyUtil.getKeyBytes(key).length
            + args.length()
            + OVERHEAD);
    setArguments(bb, collectionCreate.getCommand(), key, args);
    ((Buffer) bb).flip();
    setBuffer(bb);

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

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

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

  @Override
  public CollectionCreate getCreate() {
    return collectionCreate;
  }

  @Override
  public boolean isBulkOperation() {
    return false;
  }

  @Override
  public boolean isPipeOperation() {
    return false;
  }
}