/tests/com/google/appengine/datanucleus/WriteBlocker.java

 1/**********************************************************************
 2 Copyright (c) 2009 Google Inc.
 3
 4 Licensed under the Apache License, Version 2.0 (the "License");
 5 you may not use this file except in compliance with the License.
 6 You may obtain a copy of the License at
 7
 8 http://www.apache.org/licenses/LICENSE-2.0
 9
10 Unless required by applicable law or agreed to in writing, software
11 distributed under the License is distributed on an "AS IS" BASIS,
12 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 See the License for the specific language governing permissions and
14 limitations under the License.
15 **********************************************************************/
16package com.google.appengine.datanucleus;
17
18import java.lang.reflect.Method;
19
20/**
21 * Policy for disabling datastore writes.  Useful for proving
22 * that operations that shouldn't write to the datastore aren't
23 * actually writing to the datastore.
24 *
25 * @author Max Ross <maxr@google.com>
26 */
27public final class WriteBlocker implements DatastoreServiceInterceptor.Policy {
28
29  public void intercept(Object o, Method method, Object[] params) {
30    if (method.getName().equals("put") || method.getName().equals("delete")) {
31      throw new RuntimeException("Detected a write: " + method);
32    }
33  }
34}
35