| /* |
| * Copyright (c) 2020, 2021 Oracle and/or its affiliates. All rights reserved. |
| * |
| * This program and the accompanying materials are made available under the |
| * terms of the Eclipse Public License v. 2.0 which is available at |
| * http://www.eclipse.org/legal/epl-2.0, |
| * or the Eclipse Distribution License v. 1.0 which is available at |
| * http://www.eclipse.org/org/documents/edl-v10.php. |
| * |
| * SPDX-License-Identifier: EPL-2.0 OR BSD-3-Clause |
| */ |
| |
| package org.eclipse.persistence.internal.helper.type; |
| |
| import org.eclipse.persistence.internal.helper.ConcurrencyManager; |
| import org.eclipse.persistence.internal.helper.DeferredLockManager; |
| import org.eclipse.persistence.internal.helper.ReadLockManager; |
| |
| import java.util.Map; |
| import java.util.Set; |
| |
| import static java.util.Collections.unmodifiableMap; |
| import static java.util.Collections.unmodifiableSet; |
| |
| public class ConcurrencyManagerState { |
| |
| |
| /** |
| * Threads and the read locks each thread acquired. |
| */ |
| private final Map<Thread, ReadLockManager> readLockManagerMapClone; |
| |
| /** |
| * Threads and the deferred locks of the thread. |
| */ |
| private final Map<Thread, DeferredLockManager> deferredLockManagerMapClone; |
| |
| /** |
| * Threads that are waiting to acquire write locks (either stuck in the concurency manager code or |
| * write lock manager code) |
| */ |
| private final Map<Thread, Set<ConcurrencyManager>> unifiedMapOfThreadsStuckTryingToAcquireWriteLock; |
| |
| /** |
| * Name of the method that go stuck waiting to acquire resource and created the trace. |
| */ |
| private final Map<Thread, String> unifiedMapOfThreadsStuckTryingToAcquireWriteLockMethodName; |
| |
| /** |
| * information about threads that are waiting to acquire READ locks |
| */ |
| private final Map<Thread, ConcurrencyManager> mapThreadToWaitOnAcquireReadLockClone; |
| |
| /** |
| * Name of the method that go stuck waiting to acquire resource and created the trace. |
| */ |
| private final Map<Thread, String> mapThreadToWaitOnAcquireReadLockCloneMethodName; |
| |
| /** |
| * information about threads that are waiting for object building to finish that have acquired deferred locks |
| */ |
| private final Set<Thread> setThreadWaitingToReleaseDeferredLocksClone; |
| |
| /** |
| * Stores an explanation created by the isBuildObjectComplete from the currency manager to be returning false, that |
| * build object is not yet complete. |
| */ |
| private final Map<Thread, String> mapThreadsThatAreCurrentlyWaitingToReleaseDeferredLocksJustificationClone; |
| |
| /** |
| * information about cache keys and their relationship to threads. |
| */ |
| private final Map<ConcurrencyManager, CacheKeyToThreadRelationships> mapOfCacheKeyToDtosExplainingThreadExpectationsOnCacheKey; |
| |
| /** |
| * The write lock manager has been tweaked to store information about objects ids that the current thread has in its |
| * hands and that will required for write locks to be acquired by a committing thread. This information is |
| * especially interesting if any thread participating in a dead lock is getting stuck in the acquisition of write |
| * locks as part of the commit process. This information might end up revealing a thread that has done too many |
| * changes and is creating a bigger risk fo dead lock. The more resources an individual thread tries to grab the |
| * worse it is for the concurrency layer. The size of the change set can be interesting. |
| */ |
| private final Map<Thread, Set<Object>> mapThreadToObjectIdWithWriteLockManagerChangesClone; |
| |
| /** |
| * Create a new ConcurrencyManagerState. |
| * |
| */ |
| public ConcurrencyManagerState( |
| Map<Thread, ReadLockManager> readLockManagerMapClone, |
| Map<Thread, DeferredLockManager> deferredLockManagerMapClone, |
| Map<Thread, Set<ConcurrencyManager>> unifiedMapOfThreadsStuckTryingToAcquireWriteLock, |
| Map<Thread, String> unifiedMapOfThreadsStuckTryingToAcquireWriteLockMethodName, |
| Map<Thread, ConcurrencyManager> mapThreadToWaitOnAcquireReadLockClone, |
| Map<Thread, String> mapThreadToWaitOnAcquireReadLockCloneMethodName, |
| Set<Thread> setThreadWaitingToReleaseDeferredLocksClone, |
| Map<Thread, String> mapThreadsThatAreCurrentlyWaitingToReleaseDeferredLocksJustificationClone, |
| Map<ConcurrencyManager, CacheKeyToThreadRelationships> mapOfCacheKeyToDtosExplainingThreadExpectationsOnCacheKey, |
| Map<Thread, Set<Object>> mapThreadToObjectIdWithWriteLockManagerChangesClone) { |
| super(); |
| this.readLockManagerMapClone = readLockManagerMapClone; |
| this.deferredLockManagerMapClone = deferredLockManagerMapClone; |
| this.unifiedMapOfThreadsStuckTryingToAcquireWriteLock = unifiedMapOfThreadsStuckTryingToAcquireWriteLock; |
| this.unifiedMapOfThreadsStuckTryingToAcquireWriteLockMethodName = unifiedMapOfThreadsStuckTryingToAcquireWriteLockMethodName; |
| this.mapThreadToWaitOnAcquireReadLockClone = mapThreadToWaitOnAcquireReadLockClone; |
| this.mapThreadToWaitOnAcquireReadLockCloneMethodName = mapThreadToWaitOnAcquireReadLockCloneMethodName; |
| this.setThreadWaitingToReleaseDeferredLocksClone = setThreadWaitingToReleaseDeferredLocksClone; |
| this.mapThreadsThatAreCurrentlyWaitingToReleaseDeferredLocksJustificationClone = mapThreadsThatAreCurrentlyWaitingToReleaseDeferredLocksJustificationClone; |
| this.mapOfCacheKeyToDtosExplainingThreadExpectationsOnCacheKey = mapOfCacheKeyToDtosExplainingThreadExpectationsOnCacheKey; |
| this.mapThreadToObjectIdWithWriteLockManagerChangesClone = mapThreadToObjectIdWithWriteLockManagerChangesClone; |
| } |
| |
| /** Getter for {@link #readLockManagerMapClone} */ |
| public Map<Thread, ReadLockManager> getReadLockManagerMapClone() { |
| return unmodifiableMap(readLockManagerMapClone); |
| } |
| |
| /** Getter for {@link #deferredLockManagerMapClone} */ |
| public Map<Thread, DeferredLockManager> getDeferredLockManagerMapClone() { |
| return unmodifiableMap(deferredLockManagerMapClone); |
| } |
| |
| /** Getter for {@link #unifiedMapOfThreadsStuckTryingToAcquireWriteLock} */ |
| public Map<Thread, Set<ConcurrencyManager>> getUnifiedMapOfThreadsStuckTryingToAcquireWriteLock() { |
| return unmodifiableMap(unifiedMapOfThreadsStuckTryingToAcquireWriteLock); |
| } |
| |
| /** Getter for {@link #mapThreadToWaitOnAcquireReadLockClone} */ |
| public Map<Thread, ConcurrencyManager> getMapThreadToWaitOnAcquireReadLockClone() { |
| return unmodifiableMap(mapThreadToWaitOnAcquireReadLockClone); |
| } |
| |
| /** Getter for {@link #setThreadWaitingToReleaseDeferredLocksClone} */ |
| public Set<Thread> getSetThreadWaitingToReleaseDeferredLocksClone() { |
| return unmodifiableSet(setThreadWaitingToReleaseDeferredLocksClone); |
| } |
| |
| /** Getter for {@link #mapThreadsThatAreCurrentlyWaitingToReleaseDeferredLocksJustificationClone} */ |
| public Map<Thread, String> getMapThreadsThatAreCurrentlyWaitingToReleaseDeferredLocksJustificationClone() { |
| return unmodifiableMap(mapThreadsThatAreCurrentlyWaitingToReleaseDeferredLocksJustificationClone); |
| } |
| |
| /** Getter for {@link #mapOfCacheKeyToDtosExplainingThreadExpectationsOnCacheKey} */ |
| public Map<ConcurrencyManager, CacheKeyToThreadRelationships> getMapOfCacheKeyToDtosExplainingThreadExpectationsOnCacheKey() { |
| return unmodifiableMap(mapOfCacheKeyToDtosExplainingThreadExpectationsOnCacheKey); |
| } |
| |
| /** Getter for {@link #mapThreadToObjectIdWithWriteLockManagerChangesClone} */ |
| public Map<Thread, Set<Object>> getMapThreadToObjectIdWithWriteLockManagerChangesClone() { |
| return unmodifiableMap(mapThreadToObjectIdWithWriteLockManagerChangesClone); |
| } |
| |
| /** Getter for {@link #unifiedMapOfThreadsStuckTryingToAcquireWriteLockMethodName} */ |
| public Map<Thread, String> getUnifiedMapOfThreadsStuckTryingToAcquireWriteLockMethodName() { |
| return unmodifiableMap(unifiedMapOfThreadsStuckTryingToAcquireWriteLockMethodName); |
| } |
| |
| /** Getter for {@link #mapThreadToWaitOnAcquireReadLockCloneMethodName} */ |
| public Map<Thread, String> getMapThreadToWaitOnAcquireReadLockCloneMethodName() { |
| return unmodifiableMap(mapThreadToWaitOnAcquireReadLockCloneMethodName); |
| } |
| } |