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Diffstat (limited to 'dcae-analytics-common/src/main/java/org/onap/dcae/apod/analytics/common/service/processor/GenericMessageChainProcessor.java')
-rw-r--r-- | dcae-analytics-common/src/main/java/org/onap/dcae/apod/analytics/common/service/processor/GenericMessageChainProcessor.java | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/dcae-analytics-common/src/main/java/org/onap/dcae/apod/analytics/common/service/processor/GenericMessageChainProcessor.java b/dcae-analytics-common/src/main/java/org/onap/dcae/apod/analytics/common/service/processor/GenericMessageChainProcessor.java new file mode 100644 index 0000000..7a9fc08 --- /dev/null +++ b/dcae-analytics-common/src/main/java/org/onap/dcae/apod/analytics/common/service/processor/GenericMessageChainProcessor.java @@ -0,0 +1,70 @@ +/* + * ===============================LICENSE_START====================================== + * dcae-analytics + * ================================================================================ + * Copyright © 2017 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.dcae.apod.analytics.common.service.processor; + +import org.onap.dcae.apod.analytics.common.utils.MessageProcessorUtils.MessageProcessorFunction; + +import java.util.List; + +import static org.onap.dcae.apod.analytics.common.utils.MessageProcessorUtils.computeMessageProcessorChain; + +/** + * <p> + * A Generic Message Processor which passes the {@link ProcessorContext} from first to second + * {@link MessageProcessor} + * </p> + * + * @param <P> Processor Context sub classes + * + * @author Rajiv Singla . Creation Date: 11/8/2016. + */ +public class GenericMessageChainProcessor<P extends ProcessorContext> { + + private final List<? extends MessageProcessor<P>> messageProcessors; + private final P initialProcessorContext; + + public GenericMessageChainProcessor(List<? extends MessageProcessor<P>> messageProcessors, + P initialProcessorContext) { + this.messageProcessors = messageProcessors; + this.initialProcessorContext = initialProcessorContext; + } + + /** + * Process a processor chain + * + * @return Processor Context after processing the processor chain + */ + public P processChain() { + + final MessageProcessorFunction<P> messageProcessorFunction = + new MessageProcessorFunction<P>() { + @Override + public <M extends MessageProcessor<P>> P apply(P context, M processor) { + return processor.apply(context); + } + }; + + return computeMessageProcessorChain(messageProcessors, initialProcessorContext, + messageProcessorFunction); + + } + +} |