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Activiti Rest API tutorial

sureshtellakula

Hi,
I want to call to activiti engine through Rest API. Please provide me tutorial for this.

regards,
suresh

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Comments

martin_grofcik

Hi Suresh.

Isn't userguide sufficient for the beginning?
http://www.activiti.org/userguide/#N12B62

Martin

sureshtellakula

Hi,
I am able to call Rest call when activiti-rest web application is pointing to H2 database.I want to change H2 database to oracle.
I executed scripts given in Activiti in the oracle and modified db.properties file in Activiti-explorer and Activiti-rest web applications.
Activiti-explorer working fine i could not call Activiti Rest calls. Below error i am getting.

{"errorMessage":"couldn't initialize process engine from spring configuration resource file:/D:/apache-tomcat-7.0.42/webapps/activiti-rest/WEB-INF/classes/activiti-context.xml: null","statusCode":500}

Please suggest me on this.
regards,
suresh

martin_grofcik

Hi Suresh,

It is hard to guess from such a short error description
Did you configure your DB according to doc?
http://www.activiti.org/userguide/#databaseConfiguration

Martin

sureshtellakula

I am able to connect to db from Activiti explorer but from Activiti rest below error i am getting and i copied same db.properties from activiti explorer to activit rest.

Error:

Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'demoDataGenerator' defined in URL [file:/D:/apache-tomcat-7.0.42/webapps/activiti-rest/WEB-INF/classes/activiti-context.xml]: Invocation of init method failed; nested exception is org.springframework.transaction.CannotCreateTransactionException: Could not open JDBC Connection for transaction; nested exception is java.sql.SQLException: Listener refused the connection with the following error:
ORA-12519, TNS:no appropriate service handler found

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1455)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:519)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:294)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:225)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:291)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:609)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:918)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:469)
at org.springframework.context.support.GenericXmlApplicationContext.<init>(GenericXmlApplicationContext.java:61)
at org.activiti.spring.SpringConfigurationHelper.buildProcessEngine(SpringConfigurationHelper.java:38)
… 23 more
Caused by: org.springframework.transaction.CannotCreateTransactionException: Could not open JDBC Connection for transaction; nested exception is java.sql.SQLException: Listener refused the connection with the following error:
ORA-12519, TNS:no appropriate service handler found

at org.springframework.jdbc.datasource.DataSourceTransactionManager.doBegin(DataSourceTransactionManager.java:240)
at org.springframework.transaction.support.AbstractPlatformTransactionManager.getTransaction(AbstractPlatformTransactionManager.java:371)
at org.springframework.transaction.support.TransactionTemplate.execute(TransactionTemplate.java:127)
at org.activiti.spring.SpringTransactionInterceptor.execute(SpringTransactionInterceptor.java:45)
at org.activiti.engine.impl.interceptor.LogInterceptor.execute(LogInterceptor.java:31)
at org.activiti.engine.impl.cfg.CommandExecutorImpl.execute(CommandExecutorImpl.java:40)
at org.activiti.engine.impl.cfg.CommandExecutorImpl.execute(CommandExecutorImpl.java:35)
at org.activiti.engine.impl.TaskServiceImpl.saveTask(TaskServiceImpl.java:86)
at org.activiti.rest.service.demo.DemoDataGenerator.initDemoStandaloneTasks(DemoDataGenerator.java:248)
at org.activiti.rest.service.demo.DemoDataGenerator.init(DemoDataGenerator.java:78)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeCustomInitMethod(AbstractAutowireCapableBeanFactory.java:1581)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1522)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1452)

martin_grofcik

ORA-12519, TNS:no appropriate service handler found

Is not the root cause? May be following link could help you:

http://www.dba-oracle.com/sf_ora_12519_tns_no_appropriate_service_handler_found.htm

hemamalini

In activitirest application/WEB-INF/CLASSES/activiti-context.xml , make the following change

in demogenerator bean, set property-createdemoUsergroups and followed properties (models,processdefinition) to false and restart tomcat

osamamahmoud

when opening
http://127.0.0.1:8080/activiti-rest/
gives me
HTTP Status 404 - /activiti-rest/

——————————————————————————–

type Status report

message /activiti-rest/

description The requested resource is not available.

——————————————————————————–

Apache Tomcat/7.0.57
but activiti explorer working
any help please

jbarrez

Did you drop the rest war in Tomcat too?

Did you try GET http://127.0.0.1:8080/activiti-rest/service/repository/deployments Should give you something if it's installed correctly

osamamahmoud

Yes I added it and the URL above gives me
HTTP Status 404 - /activiti-rest/service/repository/deployments

type Status report

message /activiti-rest/service/repository/deployments

description The requested resource is not available.

Apache Tomcat/7.0.53

jbarrez

Okay, and you see the war is exploded? You've checked all log files?
Like I said, if that's all correctly configured, it should be available on that url.

osamamahmoud

Yes the file exploded and don't know how to trace this issue can you please Gide me

yvoswillens

Try setting the Tomcat loggin to a more verbose level and check your logs.
Did you check that the REST app is deployed with the correct context? (f.e. with the Tomcat manager app)

Regards,

Yvo

tcarlson

I was also getting 404 "The requested resource is not available." when calling http://localhost:8080/activiti-rest/service/repository/deployments

Changed to http://127.0.0.1:8080/activiti-rest/service/repository/deployments and now it works.

mohanish

http://127.0.0.1:8080/activiti-rest/service/repository/deployments

mohanish

Can you please post Activiti-Rest API document link.

mdnoorshid

Hi i am going through the whole documentation of activiti for my training schedule.Till now i have completed chapter-14.
Now i am trying to do ch-15 Rest Api.
When i am using the default database,for activiti-rest, i can succesfully invoke 'http://localhost:8431/activiti-rest/service/repository/deployments' and getting 200OK.But whenever i am trying to change the database to mysql.I am getting error 404 Resource not
found.
Although i was successfull to change the database of activiti-explorer.And it is working perfectly.But when i am trying to do in activiti-rest getting problem.
=======================================Please Help==================================

achadili

Guide doesn't show what is the end point ! If I deploy locallly on Tomcat and use H2 what is the URL to go to ?
I get 404 all the time ! whatt am I missing ? Thanks

jbarrez

Please post the steps you've done. It should be nothing more than changing db.properties.

akshayburjwal

Is there any way to integrate existing project webapp(Spring MVC , not a Springboot) with the acitiviti-rest because i am unable to do so with the given article present at activiti.org .