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.hc.client5.http.impl.compat;
28
29 import java.util.concurrent.locks.Condition;
30 import java.util.concurrent.locks.ReentrantLock;
31
32 import org.apache.hc.core5.annotation.Internal;
33 import org.apache.hc.core5.http.impl.nio.ExpandableBuffer;
34 import org.apache.hc.core5.util.Args;
35
36 /**
37 * TODO: to be replaced by core functionality
38 */
39 @Internal
40 abstract class AbstractSharedBuffer extends ExpandableBuffer {
41
42 final ReentrantLock lock;
43 final Condition condition;
44
45 volatile boolean endStream;
46 volatile boolean aborted;
47
48 public AbstractSharedBuffer(final ReentrantLock lock, final int initialBufferSize) {
49 super(initialBufferSize);
50 this.lock = Args.notNull(lock, "Lock");
51 this.condition = lock.newCondition();
52 }
53
54 @Override
55 public boolean hasData() {
56 lock.lock();
57 try {
58 return super.hasData();
59 } finally {
60 lock.unlock();
61 }
62 }
63
64 @Override
65 public int capacity() {
66 lock.lock();
67 try {
68 return super.capacity();
69 } finally {
70 lock.unlock();
71 }
72 }
73
74 @Override
75 public int length() {
76 lock.lock();
77 try {
78 return super.length();
79 } finally {
80 lock.unlock();
81 }
82 }
83
84 public void abort() {
85 lock.lock();
86 try {
87 endStream = true;
88 aborted = true;
89 condition.signalAll();
90 } finally {
91 lock.unlock();
92 }
93 }
94
95 public void reset() {
96 if (aborted) {
97 return;
98 }
99 lock.lock();
100 try {
101 setInputMode();
102 buffer().clear();
103 endStream = false;
104 } finally {
105 lock.unlock();
106 }
107 }
108
109 public boolean isEndStream() {
110 lock.lock();
111 try {
112 return endStream && !super.hasData();
113 } finally {
114 lock.unlock();
115 }
116 }
117
118 }