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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,
13   *  software distributed under the License is distributed on an
14   *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15   *  KIND, either express or implied.  See the License for the
16   *  specific language governing permissions and limitations
17   *  under the License.
18   *
19   */
20  package org.apache.mina.filter.buffer;
21  
22  import static org.junit.Assert.assertEquals;
23  
24  import org.apache.mina.core.buffer.IoBuffer;
25  import org.apache.mina.core.filterchain.IoFilterAdapter;
26  import org.apache.mina.core.session.DummySession;
27  import org.apache.mina.core.session.IoSession;
28  import org.apache.mina.core.write.WriteRequest;
29  import org.apache.mina.filter.logging.LoggingFilter;
30  import org.junit.Test;
31  import org.slf4j.Logger;
32  import org.slf4j.LoggerFactory;
33  
34  /**
35   * Tests {@link BufferedWriteFilter}.
36   *
37   * @author <a href="http://mina.apache.org">Apache MINA Project</a>
38   * @since MINA 2.0.0-M2
39   */
40  public class BufferedWriteFilterTest {
41      static final Logger LOGGER = LoggerFactory.getLogger(BufferedWriteFilterTest.class);
42  
43      @Test
44      public void testNonExpandableBuffer() throws Exception {
45          IoBuffer dest = IoBuffer.allocate(1);
46          assertEquals(false, dest.isAutoExpand());
47      }
48  
49      @Test
50      public void testBasicBuffering() {
51          DummySession sess = new DummySession();
52          sess.getFilterChain().addFirst("peer", new IoFilterAdapter() {
53  
54              private int counter;
55  
56              @Override
57              public void filterClose(NextFilter nextFilter, IoSession session) throws Exception {
58                  LOGGER.debug("Filter closed !");
59                  assertEquals(3, counter);
60              }
61  
62              @Override
63              public void filterWrite(NextFilter nextFilter, IoSession session, WriteRequest writeRequest)
64                      throws Exception {
65                  LOGGER.debug("New buffered message written !");
66                  counter++;
67                  try {
68                      IoBuffer buf = (IoBuffer) writeRequest.getMessage();
69                      if (counter == 3) {
70                          assertEquals(1, buf.limit());
71                          assertEquals(0, buf.get());
72                      } else {
73                          assertEquals(10, buf.limit());
74                      }
75                  } catch (Exception ex) {
76                      throw new AssertionError("Wrong message type");
77                  }
78              }
79  
80          });
81          sess.getFilterChain().addFirst("logger", new LoggingFilter());
82          BufferedWriteFilter bFilter = new BufferedWriteFilter(10);
83          sess.getFilterChain().addLast("buffer", bFilter);
84  
85          IoBuffer data = IoBuffer.allocate(1);
86          for (byte i = 0; i < 20; i++) {
87              data.put((byte) (0x30 + i));
88              data.flip();
89              sess.write(data);
90              data.clear();
91          }
92  
93          // Add one more byte to overflow the final buffer
94          data.put((byte) 0);
95          data.flip();
96          sess.write(data);
97  
98          // Flush the final byte
99          bFilter.flush(sess);
100 
101         sess.close(true);
102     }
103 }