Hello, Greeting !.I am writing a restful API for starting a process instance. I am using springTemplate.The following is the code.
private static String HOST = "localhost";
private static String PORT = "8080";
private static String PROTOCOL = "http";
public static String BASE_URL = PROTOCOL+"://"+HOST+":"+PORT+"/activiti-rest/";
TreeMap<String, Object> mainParams = new TreeMap<String, Object>();
mainParams.put("processDefinitionId", "TestingProcess:1:121704");
RestTemplate restTemplate = new RestTemplate(getAuthenticatedHeader());
URI uri = restTemplate.postForLocation(BASE_URL+"service/runtime/process-instances", null ,mainParams);
private SimpleClientHttpRequestFactory getAuthenticatedHeader() {
SimpleClientHttpRequestFactory connectionFactory = new SimpleClientHttpRequestFactory() {
@Override
protected void prepareConnection(HttpURLConnection connection, String httpMethod) throws IOException {
super.prepareConnection(connection, httpMethod);
HttpHeaders headers = new HttpHeaders();
headers.setContentType(MediaType.APPLICATION_JSON);
String authorisation = "gonzo:gonzo";
byte[] encodedAuthorisation = Base64.encodeBase64(authorisation.getBytes());
connection.setRequestProperty("Authorization", "Basic "+new String(encodedAuthorisation));
connection.setRequestProperty("Content-Type", "application/json");
connection.setRequestProperty("Accept", "application/json");
}
};
return connectionFactory;
}
The following is the exception that I am getting.09:01:09,768 [http-8080-1] DEBUG org.activiti.engine.impl.interceptor.LogInterceptor -09:01:09,769 [http-8080-1] DEBUG org.activiti.engine.impl.interceptor.LogInterceptor - — starting CheckPassword ——————————————————–09:01:09,769 [http-8080-1] DEBUG org.activiti.spring.SpringTransactionInterceptor - Running command with propagation REQUIRED09:01:10,140 [http-8080-1] DEBUG org.activiti.engine.impl.persistence.entity.UserEntity.selectUserById - ooo Using Connection [Transaction-aware proxy for target Connection from DataSource [org.springframework.jdbc.datasource.SimpleDriverDataSource@2754de0b]]09:01:10,141 [http-8080-1] DEBUG org.activiti.engine.impl.persistence.entity.UserEntity.selectUserById - ==> Preparing: select * from ACT_ID_USER where ID_ = ?09:01:10,143 [http-8080-1] DEBUG org.activiti.engine.impl.persistence.entity.UserEntity.selectUserById - ==> Parameters: gonzo(String)09:01:10,171 [http-8080-1] DEBUG org.activiti.engine.impl.db.DbSqlSession - flush summary: 0 insert, 0 update, 0 delete.09:01:10,171 [http-8080-1] DEBUG org.activiti.engine.impl.db.DbSqlSession - now executing flush…09:01:10,244 [http-8080-1] DEBUG org.activiti.engine.impl.interceptor.LogInterceptor - — CheckPassword finished ——————————————————–09:01:10,244 [http-8080-1] DEBUG org.activiti.engine.impl.interceptor.LogInterceptor -Oct 24, 2014 9:01:10 PM org.restlet.resource.UniformResource doCatchWARNING: Exception or error caught in resourcejava.lang.NullPointerException at org.activiti.rest.service.api.runtime.process.ProcessInstanceCollectionResource.createProcessInstance(ProcessInstanceCollectionResource.java:100) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.restlet.resource.ServerResource.doHandle(ServerResource.java:449) at org.restlet.resource.ServerResource.post(ServerResource.java:1114) at org.restlet.resource.ServerResource.doHandle(ServerResource.java:533) at org.restlet.resource.ServerResource.doNegotiatedHandle(ServerResource.java:590) at org.restlet.resource.ServerResource.doConditionalHandle(ServerResource.java:302) at org.restlet.resource.ServerResource.handle(ServerResource.java:849) at org.restlet.resource.Finder.handle(Finder.java:513) at org.restlet.routing.Filter.doHandle(Filter.java:159) at org.restlet.routing.Filter.handle(Filter.java:206) at org.restlet.routing.Router.doHandle(Router.java:500) at org.restlet.routing.Router.handle(Router.java:740) at org.restlet.routing.Filter.doHandle(Filter.java:159) at org.restlet.routing.Filter.handle(Filter.java:206) at org.restlet.routing.Filter.doHandle(Filter.java:159) at org.restlet.routing.Filter.handle(Filter.java:206) at org.restlet.routing.Filter.doHandle(Filter.java:159) at org.restlet.routing.Filter.handle(Filter.java:206) at org.restlet.routing.Filter.doHandle(Filter.java:159) at org.restlet.routing.Filter.handle(Filter.java:206) at org.restlet.routing.Filter.doHandle(Filter.java:159) at org.restlet.engine.application.StatusFilter.doHandle(StatusFilter.java:155) at org.restlet.routing.Filter.handle(Filter.java:206) at org.restlet.routing.Filter.doHandle(Filter.java:159) at org.restlet.routing.Filter.handle(Filter.java:206) at org.restlet.engine.ChainHelper.handle(ChainHelper.java:114) at org.restlet.engine.application.ApplicationHelper.handle(ApplicationHelper.java:75) at org.restlet.Application.handle(Application.java:391) at org.restlet.routing.Filter.doHandle(Filter.java:159) at org.restlet.routing.Filter.handle(Filter.java:206) at org.restlet.routing.Router.doHandle(Router.java:500) at org.restlet.routing.Router.handle(Router.java:740) at org.restlet.routing.Filter.doHandle(Filter.java:159) at org.restlet.routing.Filter.handle(Filter.java:206) at org.restlet.routing.Router.doHandle(Router.java:500) at org.restlet.routing.Router.handle(Router.java:740) at org.restlet.routing.Filter.doHandle(Filter.java:159) at org.restlet.routing.Filter.handle(Filter.java:206) at org.restlet.engine.ChainHelper.handle(ChainHelper.java:114) at org.restlet.Component.handle(Component.java:391) at org.restlet.Server.handle(Server.java:491) at org.restlet.engine.ServerHelper.handle(ServerHelper.java:74) at org.restlet.engine.http.HttpServerHelper.handle(HttpServerHelper.java:153) at org.restlet.ext.servlet.ServerServlet.service(ServerServlet.java:1031) at javax.servlet.http.HttpServlet.service(HttpServlet.java:723) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:861) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:606) at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489) at java.lang.Thread.run(Thread.java:662)Oct 24, 2014 9:01:10 PM org.restlet.engine.log.LogFilter afterHandleINFO: 2014-10-24 21:01:10 127.0.0.1 gonzo 127.0.0.1 8080 POST /activiti-rest/service/runtime/process-instances - 500 - 0 483 http://localhost:8080 Java/1.6.0_45 -Kindly advise…..
