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/tags/release-0.1-rc2/hive/external/ql/src/java/org/apache/hadoop/hive/ql/processors/DeleteResourceProcessor.java

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Java | 64 lines | 34 code | 9 blank | 21 comment | 6 complexity | 7754d75494c3c700294ec0e87077279a MD5 | raw file
 1/**
 2 * Licensed to the Apache Software Foundation (ASF) under one
 3 * or more contributor license agreements.  See the NOTICE file
 4 * distributed with this work for additional information
 5 * regarding copyright ownership.  The ASF licenses this file
 6 * to you under the Apache License, Version 2.0 (the
 7 * "License"); you may not use this file except in compliance
 8 * with the License.  You may obtain a copy of the License at
 9 *
10 *     http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
17 */
18
19package org.apache.hadoop.hive.ql.processors;
20
21import org.apache.commons.lang.StringUtils;
22import org.apache.commons.logging.Log;
23import org.apache.commons.logging.LogFactory;
24import org.apache.hadoop.hive.ql.parse.VariableSubstitution;
25import org.apache.hadoop.hive.ql.session.SessionState;
26import org.apache.hadoop.hive.ql.session.SessionState.LogHelper;
27
28/**
29 * DeleteResourceProcessor.
30 *
31 */
32public class DeleteResourceProcessor implements CommandProcessor {
33
34  public static final Log LOG = LogFactory.getLog(DeleteResourceProcessor.class.getName());
35  public static final LogHelper console = new LogHelper(LOG);
36
37  public void init() {
38  }
39
40  public CommandProcessorResponse run(String command) {
41    SessionState ss = SessionState.get();
42    command = new VariableSubstitution().substitute(ss.getConf(),command);
43    String[] tokens = command.split("\\s+");
44
45    SessionState.ResourceType t;
46    if (tokens.length < 1
47        || (t = SessionState.find_resource_type(tokens[0])) == null) {
48      console.printError("Usage: delete ["
49          + StringUtils.join(SessionState.ResourceType.values(), "|")
50          + "] <value> [<value>]*");
51      return new CommandProcessorResponse(1);
52    }
53
54    if (tokens.length >= 2) {
55      for (int i = 1; i < tokens.length; i++) {
56        ss.delete_resource(t, tokens[i]);
57      }
58    } else {
59      ss.delete_resource(t);
60    }
61
62    return new CommandProcessorResponse(0);
63  }
64}