| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF 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 org.apache.hadoop.fs.slive; |
| |
| import java.util.HashMap; |
| import java.util.Map; |
| import java.util.Random; |
| |
| import org.apache.hadoop.fs.slive.Constants.OperationType; |
| |
| /** |
| * Factory class which returns instances of operations given there operation |
| * type enumeration (in string or enumeration format). |
| */ |
| class OperationFactory { |
| |
| private Map<OperationType, Operation> typedOperations; |
| private ConfigExtractor config; |
| private Random rnd; |
| |
| OperationFactory(ConfigExtractor cfg, Random rnd) { |
| this.typedOperations = new HashMap<OperationType, Operation>(); |
| this.config = cfg; |
| this.rnd = rnd; |
| } |
| |
| /** |
| * Gets an operation instance (cached) for a given operation type |
| * |
| * @param type |
| * the operation type to fetch for |
| * |
| * @return Operation operation instance or null if it can not be fetched. |
| */ |
| Operation getOperation(OperationType type) { |
| Operation op = typedOperations.get(type); |
| if (op != null) { |
| return op; |
| } |
| switch (type) { |
| case READ: |
| op = new ReadOp(this.config, rnd); |
| break; |
| case LS: |
| op = new ListOp(this.config, rnd); |
| break; |
| case MKDIR: |
| op = new MkdirOp(this.config, rnd); |
| break; |
| case APPEND: |
| op = new AppendOp(this.config, rnd); |
| break; |
| case RENAME: |
| op = new RenameOp(this.config, rnd); |
| break; |
| case DELETE: |
| op = new DeleteOp(this.config, rnd); |
| break; |
| case CREATE: |
| op = new CreateOp(this.config, rnd); |
| break; |
| } |
| typedOperations.put(type, op); |
| return op; |
| } |
| } |