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Diffstat (limited to 'services/services-engine/src/main/java/org/onap/policy/apex/service/engine/event/impl/filecarrierplugin/producer/ApexFileEventProducer.java')
| -rw-r--r-- | services/services-engine/src/main/java/org/onap/policy/apex/service/engine/event/impl/filecarrierplugin/producer/ApexFileEventProducer.java | 181 |
1 files changed, 181 insertions, 0 deletions
diff --git a/services/services-engine/src/main/java/org/onap/policy/apex/service/engine/event/impl/filecarrierplugin/producer/ApexFileEventProducer.java b/services/services-engine/src/main/java/org/onap/policy/apex/service/engine/event/impl/filecarrierplugin/producer/ApexFileEventProducer.java new file mode 100644 index 000000000..d5f9ff1b2 --- /dev/null +++ b/services/services-engine/src/main/java/org/onap/policy/apex/service/engine/event/impl/filecarrierplugin/producer/ApexFileEventProducer.java @@ -0,0 +1,181 @@ +/*- + * ============LICENSE_START======================================================= + * Copyright (C) 2016-2018 Ericsson. 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. + * + * SPDX-License-Identifier: Apache-2.0 + * ============LICENSE_END========================================================= + */ + +package org.onap.policy.apex.service.engine.event.impl.filecarrierplugin.producer; + +import java.io.FileOutputStream; +import java.io.IOException; +import java.io.PrintStream; +import java.util.EnumMap; +import java.util.Map; + +import org.onap.policy.apex.core.infrastructure.threading.ThreadUtilities; +import org.onap.policy.apex.service.engine.event.ApexEventException; +import org.onap.policy.apex.service.engine.event.ApexEventProducer; +import org.onap.policy.apex.service.engine.event.ApexEventRuntimeException; +import org.onap.policy.apex.service.engine.event.PeeredReference; +import org.onap.policy.apex.service.engine.event.SynchronousEventCache; +import org.onap.policy.apex.service.engine.event.impl.filecarrierplugin.FILECarrierTechnologyParameters; +import org.onap.policy.apex.service.parameters.eventhandler.EventHandlerParameters; +import org.onap.policy.apex.service.parameters.eventhandler.EventHandlerPeeredMode; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +/** + * Concrete implementation of an Apex event producer that sends events to a file. + * + * @author Liam Fallon (liam.fallon@ericsson.com) + */ +public class ApexFileEventProducer implements ApexEventProducer { + // Get a reference to the logger + private static final Logger LOGGER = LoggerFactory.getLogger(ApexFileEventProducer.class); + + // The name for this producer + private String producerName = null; + + // The output stream to write events to + private PrintStream eventOutputStream; + + // The peer references for this event handler + private final Map<EventHandlerPeeredMode, PeeredReference> peerReferenceMap = + new EnumMap<>(EventHandlerPeeredMode.class); + + /* + * (non-Javadoc) + * + * @see org.onap.policy.apex.apps.uservice.producer.ApexEventProducer#init() + */ + @Override + public void init(final String name, final EventHandlerParameters producerParameters) throws ApexEventException { + producerName = name; + + // Get and check the Apex parameters from the parameter service + if (producerParameters == null) { + final String errorMessage = "Producer parameters for ApexFileProducer \"" + producerName + "\" is null"; + LOGGER.warn(errorMessage); + throw new ApexEventException(errorMessage); + } + + // Check and get the file Properties + if (!(producerParameters.getCarrierTechnologyParameters() instanceof FILECarrierTechnologyParameters)) { + final String errorMessage = "specified producer properties for ApexFileProducer \"" + producerName + + "\" are not applicable to a FILE producer"; + LOGGER.warn(errorMessage); + throw new ApexEventException(errorMessage); + } + final FILECarrierTechnologyParameters fileCarrierTechnologyParameters = + (FILECarrierTechnologyParameters) producerParameters.getCarrierTechnologyParameters(); + + // Now we create a writer for events + try { + if (fileCarrierTechnologyParameters.isStandardError()) { + eventOutputStream = System.err; + } else if (fileCarrierTechnologyParameters.isStandardIO()) { + eventOutputStream = System.out; + } else { + eventOutputStream = + new PrintStream(new FileOutputStream(fileCarrierTechnologyParameters.getFileName()), true); + } + } catch (final IOException e) { + final String errorMessage = "ApexFileProducer \"" + producerName + "\" failed to open file for writing: \"" + + fileCarrierTechnologyParameters.getFileName() + "\""; + LOGGER.warn(errorMessage, e); + throw new ApexEventException(errorMessage, e); + } + + if (fileCarrierTechnologyParameters.getStartDelay() > 0) { + ThreadUtilities.sleep(fileCarrierTechnologyParameters.getStartDelay()); + } + } + + /* + * (non-Javadoc) + * + * @see org.onap.policy.apex.service.engine.event.ApexEventProducer#getName() + */ + @Override + public String getName() { + return producerName; + } + + /* + * (non-Javadoc) + * + * @see org.onap.policy.apex.service.engine.event.ApexEventProducer#getPeeredReference(org.onap. + * policy.apex.service.parameters.eventhandler.EventHandlerPeeredMode) + */ + @Override + public PeeredReference getPeeredReference(final EventHandlerPeeredMode peeredMode) { + return peerReferenceMap.get(peeredMode); + } + + /* + * (non-Javadoc) + * + * @see org.onap.policy.apex.service.engine.event.ApexEventProducer#setPeeredReference(org.onap. + * policy.apex.service.parameters.eventhandler.EventHandlerPeeredMode, + * org.onap.policy.apex.service.engine.event.PeeredReference) + */ + @Override + public void setPeeredReference(final EventHandlerPeeredMode peeredMode, final PeeredReference peeredReference) { + peerReferenceMap.put(peeredMode, peeredReference); + } + + /* + * (non-Javadoc) + * + * @see org.onap.policy.apex.service.engine.event.ApexEventProducer#sendEvent(long, + * java.lang.String, java.lang.Object) + */ + @Override + public void sendEvent(final long executionId, final String eventName, final Object event) { + // Check if this is a synchronized event, if so we have received a reply + final SynchronousEventCache synchronousEventCache = + (SynchronousEventCache) peerReferenceMap.get(EventHandlerPeeredMode.SYNCHRONOUS); + if (synchronousEventCache != null) { + synchronousEventCache.removeCachedEventToApexIfExists(executionId); + } + + // Cast the event to a string, if our conversion is correctly configured, this cast should + // always work + String stringEvent = null; + try { + stringEvent = (String) event; + } catch (final Exception e) { + final String errorMessage = "error in ApexFileProducer \"" + producerName + "\" while transferring event \"" + + event + "\" to the output stream"; + LOGGER.debug(errorMessage, e); + throw new ApexEventRuntimeException(errorMessage, e); + } + + eventOutputStream.println(stringEvent); + eventOutputStream.flush(); + } + + /* + * (non-Javadoc) + * + * @see org.onap.policy.apex.apps.uservice.producer.ApexEventProducer#stop() + */ + @Override + public void stop() { + eventOutputStream.close(); + } +} |