1 /*
2 * ====================================================================
3 * Licensed to the Apache Software Foundation (ASF) under one
4 * or more contributor license agreements. See the NOTICE file
5 * distributed with this work for additional information
6 * regarding copyright ownership. The ASF licenses this file
7 * to you under the Apache License, Version 2.0 (the
8 * "License"); you may not use this file except in compliance
9 * with the License. You may obtain a copy of the License at
10 *
11 * http://www.apache.org/licenses/LICENSE-2.0
12 *
13 * Unless required by applicable law or agreed to in writing,
14 * software distributed under the License is distributed on an
15 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
16 * KIND, either express or implied. See the License for the
17 * specific language governing permissions and limitations
18 * under the License.
19 * ====================================================================
20 *
21 * This software consists of voluntary contributions made by many
22 * individuals on behalf of the Apache Software Foundation. For more
23 * information on the Apache Software Foundation, please see
24 * <http://www.apache.org/>.
25 *
26 */
27 package org.apache.http.nio.reactor.ssl;
28
29 import java.nio.ByteBuffer;
30 import org.apache.http.util.Args;
31
32 /**
33 * A {@link SSLBufferManagementStrategy} that releases the underlying buffer when deactivated.
34 */
35 public class ReleasableSSLBufferManagementStrategy implements SSLBufferManagementStrategy {
36
37 @Override
38 public SSLBuffer constructBuffer(final int size) {
39 return new InternalBuffer(size);
40 }
41
42
43 private static final class InternalBuffer implements SSLBuffer {
44
45 private ByteBuffer wrapped;
46 private final int length;
47
48 public InternalBuffer(final int size) {
49 Args.positive(size, "size");
50 this.length = size;
51 }
52
53 @Override
54 public ByteBuffer acquire() {
55 if (wrapped != null) {
56 return wrapped;
57 }
58 wrapped = ByteBuffer.allocate(length);
59 return wrapped;
60 }
61
62 @Override
63 public void release() {
64 wrapped = null;
65 }
66
67 @Override
68 public boolean isAcquired() {
69 return wrapped != null;
70 }
71
72 @Override
73 public boolean hasData() {
74 return wrapped != null && wrapped.position() > 0;
75 }
76
77 }
78 }