Java tutorial
/* * Copyright (c) 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.identity.workflow.impl; import org.apache.axiom.om.OMElement; import org.apache.axiom.soap.SOAP11Constants; import org.apache.axis2.AxisFault; import org.apache.axis2.addressing.EndpointReference; import org.apache.axis2.client.Options; import org.apache.axis2.client.ServiceClient; import org.apache.axis2.transport.http.HTTPConstants; import org.apache.axis2.transport.http.HttpTransportProperties; import org.apache.commons.lang.StringUtils; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import org.wso2.carbon.context.CarbonContext; import org.wso2.carbon.identity.workflow.impl.bean.BPSProfile; import org.wso2.carbon.identity.workflow.impl.internal.WorkflowImplServiceDataHolder; import org.wso2.carbon.identity.workflow.impl.util.WorkflowRequestBuilder; import org.wso2.carbon.identity.workflow.mgt.bean.Parameter; import org.wso2.carbon.identity.workflow.mgt.dto.WorkflowRequest; import org.wso2.carbon.identity.workflow.mgt.exception.InternalWorkflowException; import org.wso2.carbon.identity.workflow.mgt.exception.WorkflowException; import org.wso2.carbon.identity.workflow.mgt.util.WFConstant; import org.wso2.carbon.identity.workflow.mgt.util.WorkflowManagementUtil; import org.wso2.carbon.identity.workflow.mgt.workflow.WorkFlowExecutor; import org.wso2.carbon.user.core.UserCoreConstants; import org.wso2.carbon.utils.CarbonUtils; import org.wso2.carbon.utils.multitenancy.MultitenantConstants; import org.wso2.carbon.utils.multitenancy.MultitenantUtils; import java.util.ArrayList; import java.util.List; public class RequestExecutor implements WorkFlowExecutor { private static Log log = LogFactory.getLog(RequestExecutor.class); private static final String EXECUTOR_NAME = "BPELExecutor"; private List<Parameter> parameterList; private BPSProfile bpsProfile; @Override public boolean canHandle(WorkflowRequest workFlowRequest) { //Since this is handled by manager level return true; } @Override public void initialize(List<Parameter> parameterList) throws WorkflowException { this.parameterList = parameterList; Parameter bpsProfileParameter = WorkflowManagementUtil.getParameter(parameterList, WFImplConstant.ParameterName.BPS_PROFILE, WFConstant.ParameterHolder.WORKFLOW_IMPL); int tenantId = CarbonContext.getThreadLocalCarbonContext().getTenantId(); if (bpsProfileParameter != null) { String bpsProfileName = bpsProfileParameter.getParamValue(); try { bpsProfile = WorkflowImplServiceDataHolder.getInstance().getWorkflowImplService() .getBPSProfile(bpsProfileName, tenantId); } catch (WorkflowImplException e) { String errorMsg = "Error occurred while reading bps profile, " + e.getMessage(); log.error(errorMsg); throw new WorkflowException(errorMsg, e); } } } @Override public void execute(WorkflowRequest workFlowRequest) throws WorkflowException { validateExecutionParams(); OMElement requestBody = WorkflowRequestBuilder.buildXMLRequest(workFlowRequest, this.parameterList); try { callService(requestBody); } catch (AxisFault axisFault) { throw new InternalWorkflowException("Error invoking service for request: " + workFlowRequest.getUuid(), axisFault); } } @Override public String getName() { return EXECUTOR_NAME; } private void validateExecutionParams() throws InternalWorkflowException { //Since missing a parameter should lead to a exception scenario here, throwing a exception with what is // missing and returning void for successful cases. if (parameterList == null) { throw new InternalWorkflowException("Init params for the BPELExecutor is null."); } } private void callService(OMElement messagePayload) throws AxisFault { ServiceClient client = new ServiceClient(WorkflowImplServiceDataHolder.getInstance() .getConfigurationContextService().getClientConfigContext(), null); Options options = new Options(); options.setAction(WFImplConstant.DEFAULT_APPROVAL_BPEL_SOAP_ACTION); String tenantDomain = CarbonContext.getThreadLocalCarbonContext().getTenantDomain(); String host = bpsProfile.getWorkerHostURL(); String serviceName = StringUtils.deleteWhitespace(WorkflowManagementUtil.getParameter(parameterList, WFConstant.ParameterName.WORKFLOW_NAME, WFConstant.ParameterHolder.WORKFLOW_IMPL).getParamValue()); serviceName = StringUtils.deleteWhitespace(serviceName); if (host.endsWith("/")) { host = host.substring(0, host.lastIndexOf("/")); } String endpoint; if (tenantDomain != null && !tenantDomain.equals(MultitenantConstants.SUPER_TENANT_DOMAIN_NAME)) { endpoint = host + "/services/t/" + tenantDomain + "/" + serviceName + WFConstant.TemplateConstants.SERVICE_SUFFIX; } else { endpoint = host + "/services/" + serviceName + WFConstant.TemplateConstants.SERVICE_SUFFIX; } options.setTo(new EndpointReference(endpoint)); options.setProperty(org.apache.axis2.Constants.Configuration.MESSAGE_TYPE, SOAP11Constants.SOAP_11_CONTENT_TYPE); HttpTransportProperties.Authenticator auth = new HttpTransportProperties.Authenticator(); auth.setUsername(bpsProfile.getUsername()); auth.setPassword(bpsProfile.getPassword()); auth.setPreemptiveAuthentication(true); List<String> authSchemes = new ArrayList<>(); authSchemes.add(HttpTransportProperties.Authenticator.BASIC); auth.setAuthSchemes(authSchemes); options.setProperty(HTTPConstants.AUTHENTICATE, auth); options.setManageSession(true); client.setOptions(options); client.fireAndForget(messagePayload); } }