We are in the process of implementing several components which involves
java sdks (twitter), although the class mediator approach works fine, it
seems to introduce some usability issues.
- Basically, a given class mediator simply get all the required properties
from the message context where property names are hard coded in both
template and class mediator. [1]
- One possible approach that we can use is to use POJO mediator, so that we
can dynamically resolve the incoming parameters and we could have minimal
java code when implementing our connector.
- We can even get more flexibility with spring mediator as well[2].
- However, class mediator approach is better when it comes to performance
(since we use reflection in other two approaches).
- We will do a PoC on these approaches and see how it goes.
This is a sample config with POJO Mediator
eg:
package org.apache.twitter;
import org.apache.synapse.Command;
public class TwitterInvokeMediator implements Command {
private String twitterSecrect;
private String twitterId;
private String message;
public void execute() {
System.out.println("TwitterID :" + twitterId);
twitterId = "CDE";
}
public String getTwitterSecrect() {
return twitterSecrect;
}
public void setTwitterSecrect(String twitterSecrect) {
this.twitterSecrect = twitterSecrect;
}
public String getTwitterId() {
return twitterId;
}
public void setTwitterId(String twitterId) {
this.twitterId = twitterId;
}
public String getMessage() {
return message;
}
public void setMessage(String message) {
this.message = message;
}
}
Invocation :
<pojoCommand name="org.apache.twitter.TwitterInvokeMediator">
<axis2ns1:property xmlns:axis2ns1="
http://ws.apache.org/ns/synapse";
name="twitterId"
expression="$ctx:TWID"
action="ReadMessage"/>
<axis2ns1:property xmlns:axis2ns1="
http://ws.apache.org/ns/synapse";
name="twitterId"
context-name="updatedID"
action="UpdateContext"/>
</pojoCommand>
[1]
https://svn.wso2.org/repos/wso2/carbon/platform/branches/4.1.0/components/mediation/mediation-library/connectors/org.wso2.carbon.mediation.library.connectors.twitter/4.1.0/src/main/java/org/wso2/carbon/mediation/library/connectors/twitter/TwitterUpdateStatusMediator.java
[2]
https://svn.wso2.org/repos/wso2/carbon/platform/branches/4.1.0/dependencies/synapse/2.1.1-wso2v3/modules/samples/src/main/java/samples/mediators/extensions/SpringCustomLogger.java
--
Kasun Indrasiri
Software Architect
WSO2, Inc.; http://wso2.com
lean.enterprise.middleware
cell: +94 71 536 4128
Blog : http://kasunpanorama.blogspot.com/
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