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authorStraubs, Ralph (rs8887) <rs8887@att.com>2019-11-11 11:28:47 -0600
committerStraubs, Ralph (rs8887) <rs8887@att.com>2019-11-14 03:07:25 -0600
commit1320df00310f70b3cf6695466eb2d76a2d3dc49b (patch)
treec7d4f55b594db9a2bbec98a5ba1ecb207467770f /policy-core/src/main/resources
parent2b0f80062f0609f483eea287bdf503be45f12472 (diff)
Add 'DroolsRunnable' class
This provides a simple way to run arbitrary Java code within the Drools thread. This change also includes a general way to specify Drools rules that are automatically added to every Drools session. Change-Id: I5ddcca4c807dc552fbcbd4a19dce311a4d358279 Issue-ID: POLICY-1948 Signed-off-by: Straubs, Ralph (rs8887) <rs8887@att.com>
Diffstat (limited to 'policy-core/src/main/resources')
-rw-r--r--policy-core/src/main/resources/META-INF/drools/drl40
1 files changed, 40 insertions, 0 deletions
diff --git a/policy-core/src/main/resources/META-INF/drools/drl b/policy-core/src/main/resources/META-INF/drools/drl
new file mode 100644
index 00000000..949f235e
--- /dev/null
+++ b/policy-core/src/main/resources/META-INF/drools/drl
@@ -0,0 +1,40 @@
+/*
+ * ============LICENSE_START=======================================================
+ * policy-core
+ * ================================================================================
+ * Copyright (C) 2019 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.drools.core;
+
+// This rule will match any 'DroolsRunnable' instance placed in Drools
+// memory, and run the 'DroolsRunnable.run()' method. It provides a way
+// to run arbitrary Java code within a Drools session thread by inserting
+// a 'DroolsRunnable' instance into Drools memory.
+
+rule "run-drools-runnable"
+ when
+ $runnable : DroolsRunnable()
+ then
+ {
+ // we retract it first, because the 'run()' method may traverse
+ // Drools objects
+ retract($runnable);
+
+ // run the code within the Drools thread
+ $runnable.run();
+ }
+end