Created
June 26, 2012 23:33
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What the webMethods Integration Server pipeline looks like as Java
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| // Every webMethods Integration Server service has exactly one input | |
| // argument: the pipeline. | |
| // | |
| // The pipeline is like a java.util.Map object that gets passed to each | |
| // service that gets called. (It's actually a com.wm.data.IData object, | |
| // which unfortunately doesn't implement java.util.Map.) | |
| // | |
| // Because objects are passed by reference, every service called can alter | |
| // the keys and values in the pipeline. | |
| // | |
| // This is an example of how the webMethods Integration Server pipeline | |
| // would work if it was implemented in Java using java.util.Map objects. | |
| // | |
| // $ javac Pipeline.java | |
| // $ java Pipeline | |
| import java.util.*; | |
| public class Pipeline { | |
| public static void greet(Map<String, Object> pipeline) { | |
| // convert the name input argument to uppercase: this litters the | |
| // pipeline with "instring" and "outstring" variables | |
| pipeline.put("instring", pipeline.get("name")); | |
| upcase(pipeline); | |
| pipeline.put("name", pipeline.get("outstring")); | |
| // get honorific for the gender: this litters the pipeline with the | |
| // variable "honorific" | |
| honorific(pipeline); | |
| // add greeting variable to pipeline: this is an output argument for the method | |
| pipeline.put("greeting", "Hello " + pipeline.get("honorific") + " " + pipeline.get("name")); | |
| } | |
| public static void upcase(Map<String, Object> pipeline) { | |
| String instring = (String)pipeline.get("instring"); | |
| String outstring = instring.toUpperCase(); | |
| pipeline.put("outstring", outstring); | |
| } | |
| public static void honorific(Map<String, Object> pipeline) { | |
| String gender = (String)pipeline.get("gender"); | |
| String honorific = ""; | |
| if (gender.equals("male")) { | |
| honorific = "Mr"; | |
| } else if (gender.equals("female")) { | |
| honorific = "Ms"; | |
| } | |
| pipeline.put("honorific", honorific); | |
| } | |
| public static void main(String[] args) { | |
| // create a new pipeline, and populate it with some variables | |
| Map<String, Object> pipeline = new HashMap<String, Object>(); | |
| pipeline.put("name", "John Doe"); | |
| pipeline.put("gender", "male"); | |
| pipeline.put("email", "[email protected]"); | |
| pipeline.put("address", "123 Sycamore Street"); | |
| // call greet service, passing the pipeline | |
| // greet then calls upcase and honorific, both of which | |
| // litter the pipeline with their arguments | |
| greet(pipeline); | |
| System.out.println("greeting = " + pipeline.get("greeting")); | |
| System.out.println("pipeline = " + pipeline); | |
| } | |
| } |
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