/* * Copyright (c) 2005-2015, WSO2 Inc. (http://www.wso2.org) All Rights Reserved. * * WSO2 Inc. licenses this file to you 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. */ package org.wso2.carbon.inbound.endpoint.protocol.kafka; import org.apache.axiom.om.OMElement; import org.apache.axiom.om.util.UUIDGenerator; import org.apache.axis2.AxisFault; import org.apache.axis2.builder.Builder; import org.apache.axis2.builder.BuilderUtil; import org.apache.axis2.builder.SOAPBuilder; import org.apache.axis2.context.MessageContext; import org.apache.axis2.transport.TransportUtils; import org.apache.commons.io.input.AutoCloseInputStream; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import org.apache.synapse.core.SynapseEnvironment; import org.apache.synapse.inbound.InboundEndpoint; import org.apache.synapse.mediators.base.SequenceMediator; import org.apache.synapse.transport.customlogsetter.CustomLogSetter; import org.wso2.carbon.context.PrivilegedCarbonContext; import org.wso2.carbon.utils.multitenancy.MultitenantConstants; import java.io.ByteArrayInputStream; import java.io.InputStream; /** * KafkaInjectHandler uses to mediate the received Kafka message */ public class KAFKAInjectHandler implements InjectHandler { private static final Log log = LogFactory.getLog(KAFKAInjectHandler.class); private String injectingSeq; private String onErrorSeq; private boolean sequential; private SynapseEnvironment synapseEnvironment; private String contentType; public KAFKAInjectHandler(String injectingSeq, String onErrorSeq, boolean sequential, SynapseEnvironment synapseEnvironment, String contentType) { this.injectingSeq = injectingSeq; this.onErrorSeq = onErrorSeq; this.sequential = sequential; this.synapseEnvironment = synapseEnvironment; this.contentType = contentType; } /** * Determine the message builder to use, set the message payload to the message context and * inject the message to the sequence */ public boolean invoke(Object object, String name) { byte[] msg = (byte[]) object; org.apache.synapse.MessageContext msgCtx = createMessageContext(); msgCtx.setProperty("inbound.endpoint.name", name); InboundEndpoint inboundEndpoint = msgCtx.getConfiguration().getInboundEndpoint(name); CustomLogSetter.getInstance().setLogAppender(inboundEndpoint.getArtifactContainerName()); log.debug("Processed Kafka Message "); MessageContext axis2MsgCtx = ((org.apache.synapse.core.axis2.Axis2MessageContext) msgCtx) .getAxis2MessageContext(); // Determine the message builder to use Builder builder = null; if (contentType == null) { log.debug("No content type specified. Using SOAP builder."); builder = new SOAPBuilder(); } else { int index = contentType.indexOf(';'); String type = index > 0 ? contentType.substring(0, index) : contentType; try { builder = BuilderUtil.getBuilderFromSelector(type, axis2MsgCtx); } catch (AxisFault axisFault) { log.error("Error while creating message builder :: " + axisFault.getMessage(), axisFault); } if (builder == null) { if (log.isDebugEnabled()) { log.debug("No message builder found for type '" + type + "'. Falling back to SOAP."); } builder = new SOAPBuilder(); } } OMElement documentElement = null; // set the message payload to the message context InputStream in = new AutoCloseInputStream(new ByteArrayInputStream(msg)); try { documentElement = builder.processDocument(in, contentType, axis2MsgCtx); } catch (AxisFault axisFault) { log.error("Error while processing message :: " + axisFault.getMessage(), axisFault); } try { msgCtx.setEnvelope(TransportUtils .createSOAPEnvelope(documentElement)); } catch (AxisFault axisFault) { log.error("Error while setting message payload to the message context :: " + axisFault.getMessage(), axisFault); } // Inject the message to the sequence. if (injectingSeq == null || injectingSeq.equals("")) { log.error("Sequence name not specified. Sequence : " + injectingSeq); return false; } SequenceMediator seq = (SequenceMediator) synapseEnvironment .getSynapseConfiguration().getSequence(injectingSeq); if (seq != null) { if (log.isDebugEnabled()) { log.debug("injecting message to sequence : " + injectingSeq); } if (!seq.isInitialized()) { seq.init(synapseEnvironment); } seq.setErrorHandler(onErrorSeq); synapseEnvironment.injectInbound(msgCtx, seq, sequential); } else { log.error("Sequence: " + injectingSeq + " not found"); } return true; } /** * Create the initial message context for kafka */ private org.apache.synapse.MessageContext createMessageContext() { org.apache.synapse.MessageContext msgCtx = synapseEnvironment .createMessageContext(); MessageContext axis2MsgCtx = ((org.apache.synapse.core.axis2.Axis2MessageContext) msgCtx) .getAxis2MessageContext(); axis2MsgCtx.setServerSide(true); axis2MsgCtx.setMessageID(UUIDGenerator.getUUID()); msgCtx.setProperty(MessageContext.CLIENT_API_NON_BLOCKING, true); PrivilegedCarbonContext carbonContext = PrivilegedCarbonContext.getThreadLocalCarbonContext(); axis2MsgCtx.setProperty(MultitenantConstants.TENANT_DOMAIN, carbonContext.getTenantDomain()); return msgCtx; } }