#346 Async: implement simple and important JSON parameters for commands

javalite-async/src/main/java/org/javalite/async/Command.java

@@ -18,14 +18,18 @@
 package org.javalite.async;
 
 import com.thoughtworks.xstream.XStream;
+import org.javalite.common.JsonHelper;
 
 import java.io.ByteArrayInputStream;
 import java.io.ByteArrayOutputStream;
 import java.io.IOException;
+import java.util.Map;
 import java.util.zip.ZipEntry;
 import java.util.zip.ZipInputStream;
 import java.util.zip.ZipOutputStream;
 
+import static org.javalite.common.Collections.map;
+
 /**
  * Super class of all commands. Only the method {@link #execute()} is to be provided by subclasses to
  * do real application work.
@@ -36,6 +40,8 @@ public abstract class Command {
 
     private String jmsMessageId;
 
+    private Map params = map("class", getClass().getSimpleName());
+
     private static final XStream X_STREAM = new XStream(new CDATAXppDriver());
 
     /**
@@ -106,4 +112,23 @@ public String getJMSMessageID() {
     public void setJMSMessageID(String jmsMessageId) {
         this.jmsMessageId = jmsMessageId;
     }
+
+    /**
+     * Sets parameters and their values to reflect by the {@link #toJson()} method.
+     *
+     * @param params important parameters of this command - tings you want to see in a log file.
+     */
+    public void setJsonParams(Map params){
+        this.params = params;
+        this.params.put("class", getClass().getSimpleName());
+    }
+
+    /**
+     * Used by writing returned value to the log.
+     *
+     * @return JSON representation  of this command.
+     */
+    public String toJson(){
+        return JsonHelper.toJsonString(params);
+    }
 }