summaryrefslogtreecommitdiffstats
path: root/feature-no-locking/src/main
diff options
context:
space:
mode:
authorjhh <jorge.hernandez-herrero@att.com>2021-03-09 10:01:17 -0600
committerjhh <jorge.hernandez-herrero@att.com>2021-03-09 15:03:32 -0600
commit149df90bb72ece740accaf3ea037cf40defcd1bd (patch)
treef0895c1729c06403abecadca1065d3dfc25de35f /feature-no-locking/src/main
parentdd9d31e90873e12623865fb21bf2e4603e3e0f19 (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')
-rw-r--r--feature-no-locking/src/main/java/org/onap/policy/no/locking/NoLockManager.java96
-rw-r--r--feature-no-locking/src/main/resources/META-INF.services/org.onap.policy.drools.features.PolicyEngineFeatureApi1
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 \ No newline at end of file