Skip to main content

Invoking REST API using BPMN

You can use BPMN Service Task and configure it as following to invoke a REST API





Example with text input and text output:
<serviceTask id="servicetask1" name="REST task1" activiti:class="org.wso2.carbon.bpmn.extensions.rest.RESTTask">
<extensionElements>
<activiti:field name="serviceURL">
<activiti:expression>http://10.0.3.1:9773/restSample1_1.0.0/services/rest_sample1/${method}</activiti:expression>
</activiti:field>
<activiti:field name="basicAuthUsername">
<activiti:expression>bobcat</activiti:expression>
</activiti:field>
<activiti:field name="basicAuthPassword">
<activiti:expression>bobcat</activiti:expression>
</activiti:field>
<activiti:field name="method">
<activiti:string><![CDATA[POST]]></activiti:string>
</activiti:field>
<activiti:field name="input">
<activiti:expression>Input for task1</activiti:expression>
</activiti:field>
<activiti:field name="outputVariable">
<activiti:string><![CDATA[v1]]></activiti:string>
</activiti:field>
<activiti:field name="headers">
<activiti:string><![CDATA[key1:value1,key2:value2]]></activiti:string>
</activiti:field>
</extensionElements>
</serviceTask>
view raw WSO2_config_16 hosted with ❤ by GitHub

Example with JSON input and JSON output mapping and registry based URL:


<serviceTask id="servicetask2" name="Rest task2" activiti:class="org.wso2.carbon.bpmn.extensions.rest.RESTTask">
<extensionElements>
<activiti:field name="serviceRef">
<activiti:expression>conf:/test1/service2</activiti:expression>
</activiti:field>
<activiti:field name="method">
<activiti:string><![CDATA[POST]]></activiti:string>
</activiti:field>
<activiti:field name="input">
<activiti:expression>
{
"companyName":"ibm",
"industry":"${industry}",
"address":{
"country":"USA",
"state":"${state}"}
}
</activiti:expression>
</activiti:field>
<activiti:field name="outputMappings">
<activiti:string><![CDATA[var2:customer.name,var3:item.price]]></activiti:string>
</activiti:field>
</extensionElements>
</serviceTask>
view raw WSO2_config_17 hosted with ❤ by GitHub
You can find implementation of org.wso2.carbon.bpmn.extensions.rest.RESTTask class here
https://github.com/wso2/carbon-business-process/blob/master/components/bpmn/org.wso2.carbon.bpmn/src/main/java/org/wso2/carbon/bpmn/extensions/rest/RESTTask.java

Currently it supports GET and POST only. If you need support for other HTTP methods you have to implement custom java service task similar to REST Task implementation that supports rest of REST API functionalities.






Labels

Labels:

Comments

Micheal Alexander said…
Congratulation for the great post. Those who come to read your Information will find lots of helpful and informative tips. Key performance indicators sample for Cloud BPM
April 2, 2020 at 1:37 PM
Post a Comment

Popular posts from this blog

How to generate random unique number in SOAP UI request

eg 1: ${=System.currentTimeMillis() + ((int)(Math.random()*10000))} eg 2: ${=java.util.UUID.randomUUID()} ${=java.util.UUID.randomUUID()} ${=System.currentTimeMillis() + ((int)(Math.random()*10000))} - See more at: http://tryitnw.blogspot.com/2014/03/generating-random-unique-number-in-soap.html#sthash.m2S4tUFu.dpuf ${=System.currentTimeMillis() + ((int)(Math.random()*10000))} - See more at: http://tryitnw.blogspot.com/2014/03/generating-random-unique-number-in-soap.html#sthash.m2S4tUFu.dpuf ${=System.currentTimeMillis() + ((int)(Math.random()*10000))} - See more at: http://tryitnw.blogspot.com/2014/03/generating-random-unique-number-in-soap.html#sthash.m2S4tUFu.dpuf
Post a Comment
Read more

Tips on using environment variables in WSO2 Integration Cloud

Environment variables allow you to change an application's internal configuration without changing its source code. Let’s say you want to deploy the same application in development, testing  and production environments. Then database related configs and some other internal configurations may change from one environment to another. If we can define these configurations as an environment variables we can easily set those without changing the source code of that application. When you deploy your application in WSO2 Integration Cloud, it lets you define environment variables via the UI. Whenever you change the values of environment variables, you just need to redeploy the application for the changes to take effect. Predefined environment variables Key Concepts - Environment Variables   provides you some predefined set of environment variables which will be useful when deploying applications in WSO2 Integration Cloud. Sample on how to use environment variables ...
Post a Comment
Read more