Java tutorial
/* * Copyright (c) 2006-2007 Massachusetts General Hospital * All rights reserved. This program and the accompanying materials * are made available under the terms of the i2b2 Software License v1.0 * which accompanies this distribution. * * Contributors: * Rajesh Kuttan */ package edu.harvard.i2b2.crc.delegate; import java.io.StringWriter; import javax.xml.bind.JAXBElement; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import edu.harvard.i2b2.common.exception.I2B2Exception; import edu.harvard.i2b2.common.util.jaxb.JAXBUnWrapHelper; import edu.harvard.i2b2.common.util.jaxb.JAXBUtil; import edu.harvard.i2b2.common.util.jaxb.JAXBUtilException; import edu.harvard.i2b2.crc.datavo.CRCJAXBUtil; import edu.harvard.i2b2.crc.datavo.db.DataSourceLookup; import edu.harvard.i2b2.crc.datavo.i2b2message.ApplicationType; import edu.harvard.i2b2.crc.datavo.i2b2message.BodyType; import edu.harvard.i2b2.crc.datavo.i2b2message.InfoType; import edu.harvard.i2b2.crc.datavo.i2b2message.MessageControlIdType; import edu.harvard.i2b2.crc.datavo.i2b2message.MessageHeaderType; import edu.harvard.i2b2.crc.datavo.i2b2message.PollingUrlType; import edu.harvard.i2b2.crc.datavo.i2b2message.RequestMessageType; import edu.harvard.i2b2.crc.datavo.i2b2message.ResponseHeaderType; import edu.harvard.i2b2.crc.datavo.i2b2message.ResponseMessageType; import edu.harvard.i2b2.crc.datavo.i2b2message.ResultStatusType; import edu.harvard.i2b2.crc.datavo.i2b2message.StatusType; /** * Top level class to process the request. There will be seperate requesthandler * class for each request type. The main processing of for the request will be * done inside execute function $Id: RequestHandler.java,v 1.10 2008/03/19 * 22:38:24 rk903 Exp $ * * @author rkuttan */ public abstract class RequestHandler { /** log **/ protected final Log log = LogFactory.getLog(getClass()); protected DataSourceLookup dataSourceLookup = null; /** * Function to perform operation on the given request * * @return response xml message */ public abstract BodyType execute() throws I2B2Exception; /** * Class to fetch specific request message from i2b2 message xml * * @param requestXml * @param classname * @return object which is of type classname * @throws JAXBUtilException */ protected Object getRequestType(String requestXml, Class classname) throws JAXBUtilException { Object returnObject = null; JAXBUtil jaxbUtil = CRCJAXBUtil.getJAXBUtil(); JAXBElement jaxbElement = jaxbUtil.unMashallFromString(requestXml); RequestMessageType requestMessageType = (RequestMessageType) jaxbElement.getValue(); BodyType bodyType = requestMessageType.getMessageBody(); JAXBUnWrapHelper unWrapHelper = new JAXBUnWrapHelper(); // get request header type returnObject = unWrapHelper.getObjectByClass(bodyType.getAny(), classname); return returnObject; } /** * Function to build response message type using given bodytype and request * xml * * @param requestXml * @param bodyType * @return i2b2 response message xml * @throws JAXBUtilException */ protected String buildResponseMessage(String requestXml, BodyType bodyType) throws JAXBUtilException { JAXBUtil util = CRCJAXBUtil.getJAXBUtil(); RequestMessageType requestMsgType = getI2B2RequestMessageType(requestXml); MessageHeaderType messageHeader = requestMsgType.getMessageHeader(); // reverse sending and receiving app ApplicationType sendingApp = messageHeader.getSendingApplication(); ApplicationType receiveApp = messageHeader.getReceivingApplication(); messageHeader.setSendingApplication(receiveApp); messageHeader.setReceivingApplication(sendingApp); // set instance num MessageControlIdType messageControlIdType = messageHeader.getMessageControlId(); if (messageControlIdType != null) { messageControlIdType.setInstanceNum(1); } StatusType statusType = new StatusType(); statusType.setType("DONE"); // :TODO statusType.setValue(sessionId); PollingUrlType pollingType = new PollingUrlType(); pollingType.setIntervalMs(100); // :TODO value come from property file // pollingType.setValue( // "http://host:port/QueryProcessor/getResult"); ResultStatusType resultStatusType = new ResultStatusType(); resultStatusType.setStatus(statusType); resultStatusType.setPollingUrl(pollingType); InfoType infoType = new InfoType(); // :TODO value come from property file //infoType.setUrl("http://host:port/QueryProcessor/getStatus"); infoType.setValue("Log information"); ResponseHeaderType responseHeader = new ResponseHeaderType(); responseHeader.setResultStatus(resultStatusType); responseHeader.setInfo(infoType); ResponseMessageType responseMessageType = new ResponseMessageType(); responseMessageType.setMessageHeader(messageHeader); responseMessageType.setResponseHeader(responseHeader); responseMessageType.setMessageBody(bodyType); edu.harvard.i2b2.crc.datavo.i2b2message.ObjectFactory of = new edu.harvard.i2b2.crc.datavo.i2b2message.ObjectFactory(); StringWriter strWriter = new StringWriter(); util.marshaller(of.createResponse(responseMessageType), strWriter); return strWriter.toString(); } /** * Function to unmarshall i2b2 request message type * * @param requestXml * @return RequestMessageType * @throws JAXBUtilException */ protected RequestMessageType getI2B2RequestMessageType(String requestXml) throws JAXBUtilException { JAXBUtil jaxbUtil = CRCJAXBUtil.getJAXBUtil(); JAXBElement jaxbElement = jaxbUtil.unMashallFromString(requestXml); RequestMessageType requestMessageType = (RequestMessageType) jaxbElement.getValue(); return requestMessageType; } /** * Function marshall i2b2 response message type * * @param responseMessageType * @return */ protected String getResponseString(ResponseMessageType responseMessageType) { StringWriter strWriter = new StringWriter(); try { edu.harvard.i2b2.crc.datavo.i2b2message.ObjectFactory of = new edu.harvard.i2b2.crc.datavo.i2b2message.ObjectFactory(); JAXBUtil jaxbUtil = CRCJAXBUtil.getJAXBUtil(); jaxbUtil.marshaller(of.createResponse(responseMessageType), strWriter); } catch (JAXBUtilException e) { log.error("Error while generating response message" + e.getMessage()); } return strWriter.toString(); } protected edu.harvard.i2b2.crc.datavo.setfinder.query.StatusType buildCRCStausType(String statusType, String message) { edu.harvard.i2b2.crc.datavo.setfinder.query.StatusType st = new edu.harvard.i2b2.crc.datavo.setfinder.query.StatusType(); edu.harvard.i2b2.crc.datavo.setfinder.query.StatusType.Condition condition = new edu.harvard.i2b2.crc.datavo.setfinder.query.StatusType.Condition(); condition.setType(statusType); condition.setValue(message); st.getCondition().add(condition); return st; } protected void setDataSourceLookup(String requestXml) throws JAXBUtilException { RequestMessageType reqMessage = getI2B2RequestMessageType(requestXml); String projectId = reqMessage.getMessageHeader().getProjectId(); String domainId = reqMessage.getMessageHeader().getSecurity().getDomain(); String userId = reqMessage.getMessageHeader().getSecurity().getUsername(); dataSourceLookup = new DataSourceLookup(); dataSourceLookup.setProjectPath(projectId); dataSourceLookup.setDomainId(domainId); dataSourceLookup.setOwnerId(userId); } protected DataSourceLookup getDataSourceLookup() { return dataSourceLookup; } }