diff options
author | jhh <jorge.hernandez-herrero@att.com> | 2021-03-09 10:01:17 -0600 |
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committer | jhh <jorge.hernandez-herrero@att.com> | 2021-03-09 15:03:32 -0600 |
commit | 149df90bb72ece740accaf3ea037cf40defcd1bd (patch) | |
tree | f0895c1729c06403abecadca1065d3dfc25de35f /feature-no-locking/src/main | |
parent | dd9d31e90873e12623865fb21bf2e4603e3e0f19 (diff) |
add no locking feature
It provides an interface to applications for locking
purposes that always succeeds. It does not deny
acquiring resource locks.
Issue-ID: POLICY-3114
Signed-off-by: jhh <jorge.hernandez-herrero@att.com>
Change-Id: I6aebb5f40e4176e0ff7b0e6c6d4042a79dd0b7a3
Signed-off-by: jhh <jorge.hernandez-herrero@att.com>
Diffstat (limited to 'feature-no-locking/src/main')
2 files changed, 97 insertions, 0 deletions
diff --git a/feature-no-locking/src/main/java/org/onap/policy/no/locking/NoLockManager.java b/feature-no-locking/src/main/java/org/onap/policy/no/locking/NoLockManager.java new file mode 100644 index 00000000..1fa44391 --- /dev/null +++ b/feature-no-locking/src/main/java/org/onap/policy/no/locking/NoLockManager.java @@ -0,0 +1,96 @@ +/* + * ============LICENSE_START======================================================= + * ONAP + * ================================================================================ + * Copyright (C) 2021 AT&T Intellectual Property. All rights reserved. + * ================================================================================ + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * ============LICENSE_END========================================================= + */ + +package org.onap.policy.no.locking; + +import java.util.Properties; +import lombok.NoArgsConstructor; +import lombok.ToString; +import org.onap.policy.drools.core.lock.AlwaysSuccessLock; +import org.onap.policy.drools.core.lock.Lock; +import org.onap.policy.drools.core.lock.LockCallback; +import org.onap.policy.drools.core.lock.PolicyResourceLockManager; +import org.onap.policy.drools.features.PolicyEngineFeatureApi; +import org.onap.policy.drools.system.PolicyEngine; + +/** + * In contrast with other implementations the no-lock manager provides non-synchronized access + * to resources. + */ + +@NoArgsConstructor +@ToString +public class NoLockManager implements PolicyResourceLockManager, PolicyEngineFeatureApi { + + protected static final int SEQNO = 2000; + + @Override + public Lock createLock(String resourceId, String ownerKey, int holdSec, + LockCallback callback, boolean waitForLock) { + AlwaysSuccessLock successLock = new AlwaysSuccessLock(resourceId, ownerKey, holdSec, callback); + successLock.notifyAvailable(); + return successLock; + } + + @Override + public boolean lock() { + return true; + } + + @Override + public boolean unlock() { + return true; + } + + @Override + public boolean isLocked() { + return false; + } + + @Override + public boolean start() { + return true; + } + + @Override + public boolean stop() { + return true; + } + + @Override + public void shutdown() { + // nothing to do + } + + @Override + public boolean isAlive() { + return true; + } + + @Override + public int getSequenceNumber() { + return SEQNO; + } + + @Override + public PolicyResourceLockManager beforeCreateLockManager(PolicyEngine engine, Properties properties) { + return this; + } +} diff --git a/feature-no-locking/src/main/resources/META-INF.services/org.onap.policy.drools.features.PolicyEngineFeatureApi b/feature-no-locking/src/main/resources/META-INF.services/org.onap.policy.drools.features.PolicyEngineFeatureApi new file mode 100644 index 00000000..e8a5d79f --- /dev/null +++ b/feature-no-locking/src/main/resources/META-INF.services/org.onap.policy.drools.features.PolicyEngineFeatureApi @@ -0,0 +1 @@ +org.onap.policy.no.locking.NoLockManager
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