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Diffstat (limited to 'feature-pooling-dmaap/src/main/java/org/onap/policy/drools/pooling/PoolingManager.java')
-rw-r--r-- | feature-pooling-dmaap/src/main/java/org/onap/policy/drools/pooling/PoolingManager.java | 152 |
1 files changed, 152 insertions, 0 deletions
diff --git a/feature-pooling-dmaap/src/main/java/org/onap/policy/drools/pooling/PoolingManager.java b/feature-pooling-dmaap/src/main/java/org/onap/policy/drools/pooling/PoolingManager.java new file mode 100644 index 00000000..de08d1e1 --- /dev/null +++ b/feature-pooling-dmaap/src/main/java/org/onap/policy/drools/pooling/PoolingManager.java @@ -0,0 +1,152 @@ +/* + * ============LICENSE_START======================================================= + * ONAP + * ================================================================================ + * Copyright (C) 2018 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.pooling; + +import java.util.concurrent.CountDownLatch; +import java.util.concurrent.ScheduledFuture; +import org.onap.policy.drools.pooling.message.BucketAssignments; +import org.onap.policy.drools.pooling.message.Forward; +import org.onap.policy.drools.pooling.message.Message; +import org.onap.policy.drools.pooling.state.State; +import org.onap.policy.drools.pooling.state.StateTimerTask; + +/** + * Pooling manager for a single PolicyController. + */ +public interface PoolingManager { + + /** + * Gets the properties used to configure the manager. + * + * @return + */ + public PoolingProperties getProperties(); + + /** + * Gets the host id. + * + * @return the host id + */ + public String getHost(); + + /** + * Gets the name of the internal DMaaP topic used by this manager to + * communicate with its other hosts. + * + * @return the name of the internal DMaaP topic + */ + public String getTopic(); + + /** + * Indicates that communication with internal DMaaP topic failed, typically + * due to a missed heart beat. Stops the PolicyController. + * + * @return a latch that can be used to determine when the controller's + * stop() method has completed + */ + public CountDownLatch internalTopicFailed(); + + /** + * Starts distributing requests according to the given bucket assignments. + * + * @param assignments must <i>not</i> be {@code null} + */ + public void startDistributing(BucketAssignments assignments); + + /** + * Gets the current bucket assignments. + * + * @return the current bucket assignments, or {@code null} if no assignments + * have been made + */ + public BucketAssignments getAssignments(); + + /** + * Publishes a message to the internal topic on the administrative channel. + * + * @param msg message to be published + */ + public void publishAdmin(Message msg); + + /** + * Publishes a message to the internal topic on a particular channel. + * + * @param channel channel on which the message should be published + * @param msg message to be published + */ + public void publish(String channel, Message msg); + + /** + * Handles a {@link Forward} event that was received from the internal + * topic. + * + * @param event + */ + public void handle(Forward event); + + /** + * Schedules a timer to fire after a delay. + * + * @param delayMs delay, in milliseconds + * @param task + * @return a future that can be used to cancel the timer + */ + public ScheduledFuture<?> schedule(long delayMs, StateTimerTask task); + + /** + * Schedules a timer to fire repeatedly. + * + * @param initialDelayMs initial delay, in milliseconds + * @param delayMs delay, in milliseconds + * @param task + * @return a future that can be used to cancel the timer + */ + public ScheduledFuture<?> scheduleWithFixedDelay(long initialDelayMs, long delayMs, StateTimerTask task); + + /** + * Transitions to the "start" state. + * + * @return the new state + */ + public State goStart(); + + /** + * Transitions to the "query" state. + * + * @return the new state + */ + public State goQuery(); + + /** + * Transitions to the "active" state. + * + * @return the new state + */ + public State goActive(); + + /** + * Transitions to the "inactive" state. + * + * @return the new state + */ + public State goInactive(); + +} |