Magnolia Module Memcached 5.4.2
File ReadWriteLockSync.java
Coverage histogram
16% of files have more coverage
Classes
| Class | Line # | Actions | |||||
|---|---|---|---|---|---|---|---|
| ReadWriteLockSync | 28 | 19 | 7.1% | 11 | 6 |
Contributing tests
This file is covered by 10 tests.
.
Source view
| 1 | /** | |
| 2 | * Copyright Terracotta, 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 | */ | |
| 16 | package info.magnolia.cache.concurrent; | |
| 17 | ||
| 18 | import java.util.concurrent.locks.ReentrantReadWriteLock; | |
| 19 | import java.util.concurrent.locks.Lock; | |
| 20 | import java.util.concurrent.TimeUnit; | |
| 21 | import java.util.concurrent.locks.ReadWriteLock; | |
| 22 | ||
| 23 | /** | |
| 24 | * A simple ReadWriteLock synchronizer. | |
| 25 | * | |
| 26 | * @author Alex Snaps | |
| 27 | */ | |
| 28 | public class ReadWriteLockSync { | |
| 29 | ||
| 30 | private final ReentrantReadWriteLock rrwl; | |
| 31 | ||
| 32 | /** | |
| 33 | * default constructor. | |
| 34 | */ | |
| 35 | 36864 |  public ReadWriteLockSync() { |
| 36 | 36864 | this(new ReentrantReadWriteLock()); |
| 37 | } | |
| 38 | ||
| 39 | /** | |
| 40 | * Constructor. | |
| 41 | * @param lock | |
| 42 | */ | |
| 43 | 36864 | public ReadWriteLockSync(ReentrantReadWriteLock lock) { |
| 44 | 36864 | this.rrwl = lock; |
| 45 | } | |
| 46 | /** | |
| 47 | * {@inheritDoc} | |
| 48 | */ | |
| 49 | 10 | public void lock(final LockType type) { |
| 50 | 10 | getLock(type).lock(); |
| 51 | } | |
| 52 | ||
| 53 | /** | |
| 54 | * {@inheritDoc} | |
| 55 | */ | |
| 56 | 34 | public boolean tryLock(final LockType type, final long msec) throws InterruptedException { |
| 57 | 34 | return getLock(type).tryLock(msec, TimeUnit.MILLISECONDS); |
| 58 | } | |
| 59 | ||
| 60 | /** | |
| 61 | * {@inheritDoc} | |
| 62 | */ | |
| 63 | 43 | public void unlock(final LockType type) { |
| 64 | 43 | getLock(type).unlock(); |
| 65 | } | |
| 66 | ||
| 67 | 87 | private Lock getLock(final LockType type) { |
| 68 | 87 | switch (type) { |
| 69 | 57 | case READ: |
| 70 | 57 | return rrwl.readLock(); |
| 71 | 30 | case WRITE: |
| 72 | 30 | return rrwl.writeLock(); |
| 73 | 0 | default: |
| 74 | 0 | throw new IllegalArgumentException("We don't support any other lock type than READ or WRITE!"); |
| 75 | } | |
| 76 | } | |
| 77 | ||
| 78 | /** | |
| 79 | * Gets the {@code ReadWriteLock} backing this sync. | |
| 80 | * | |
| 81 | * @return the backing {@code ReadWriteLock} | |
| 82 | */ | |
| 83 | public ReadWriteLock getReadWriteLock() { |
|
| 84 | return rrwl; | |
| 85 | } | |
| 86 | ||
| 87 | /** | |
| 88 | * {@inheritDoc} | |
| 89 | */ | |
| 90 | 15 | public boolean isHeldByCurrentThread(LockType type) { |
| 91 | 15 | switch (type) { |
| 92 | 0 | case READ: |
| 93 | 0 | throw new UnsupportedOperationException("Querying of read lock is not supported."); |
| 94 | 15 | case WRITE: |
| 95 | 15 | return rrwl.isWriteLockedByCurrentThread(); |
| 96 | 0 | default: |
| 97 | 0 | throw new IllegalArgumentException("We don't support any other lock type than READ or WRITE!"); |
| 98 | } | |
| 99 | } | |
| 100 | } |