From 7cf971cfe478fc4a170ea17274f44b24eae97e2b Mon Sep 17 00:00:00 2001
From: Trygve Laugstøl <trygvis@inamo.no>
Date: Tue, 6 May 2014 22:30:40 +0200
Subject: o Support for triggering builds from MQ messages with an MVEL
 expression.

---
 pom.xml                                            |   8 +-
 .../plugins/activemq/ActiveMqBuildTrigger.java     | 101 +++++++++++++++++++++
 .../jenkinsci/plugins/activemq/ActiveMqPlugin.java |  27 ++++++
 .../activemq/ActiveMqBuildTrigger/config.jelly     |   6 ++
 4 files changed, 141 insertions(+), 1 deletion(-)
 create mode 100644 src/main/java/org/jenkinsci/plugins/activemq/ActiveMqBuildTrigger.java
 create mode 100644 src/main/resources/org/jenkinsci/plugins/activemq/ActiveMqBuildTrigger/config.jelly

diff --git a/pom.xml b/pom.xml
index 28f454f..3cebc1e 100644
--- a/pom.xml
+++ b/pom.xml
@@ -1,4 +1,5 @@
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
   <modelVersion>4.0.0</modelVersion>
   <parent>
     <groupId>org.jenkins-ci.plugins</groupId>
@@ -26,6 +27,11 @@
       <artifactId>activemq-pool</artifactId>
       <version>${version.activemq}</version>
     </dependency>
+    <dependency>
+      <groupId>org.mvel</groupId>
+      <artifactId>mvel2</artifactId>
+      <version>2.1.9.Final</version>
+    </dependency>
   </dependencies>
 
   <licenses>
diff --git a/src/main/java/org/jenkinsci/plugins/activemq/ActiveMqBuildTrigger.java b/src/main/java/org/jenkinsci/plugins/activemq/ActiveMqBuildTrigger.java
new file mode 100644
index 0000000..f3a2a79
--- /dev/null
+++ b/src/main/java/org/jenkinsci/plugins/activemq/ActiveMqBuildTrigger.java
@@ -0,0 +1,101 @@
+package org.jenkinsci.plugins.activemq;
+
+import hudson.Extension;
+import hudson.model.BuildableItem;
+import hudson.model.Item;
+import hudson.triggers.Trigger;
+import hudson.triggers.TriggerDescriptor;
+import hudson.util.FormValidation;
+import org.kohsuke.stapler.DataBoundConstructor;
+import org.kohsuke.stapler.QueryParameter;
+import org.mvel2.MVEL;
+import org.slf4j.Logger;
+
+import java.io.Serializable;
+import java.util.Map;
+
+import static java.util.Collections.singletonMap;
+import static org.apache.commons.lang.StringUtils.trimToNull;
+import static org.jenkinsci.plugins.activemq.ActiveMqClient.BuildRequest;
+import static org.mvel2.MVEL.compileExpression;
+import static org.slf4j.LoggerFactory.getLogger;
+
+public class ActiveMqBuildTrigger extends Trigger<BuildableItem> {
+
+    private static final Logger log = getLogger(ActiveMqBuildTrigger.class);
+
+    private String mvel;
+
+    private transient Serializable compiledMvel;
+
+    // parameters['jobName'] == 'fast-build'
+    @DataBoundConstructor
+    public ActiveMqBuildTrigger(String mvel) {
+        log.info("ActiveMqBuildTrigger.ActiveMqBuildTrigger");
+        setMvel_(mvel);
+    }
+
+    public String getMvel() {
+        log.info("ActiveMqBuildTrigger.getMvel");
+        return mvel;
+    }
+
+    private void setMvel_(String mvel) {
+        mvel = trimToNull(mvel);
+        if (mvel == null) {
+            this.mvel = null;
+            this.compiledMvel = null;
+            return;
+        }
+
+        try {
+            compiledMvel = compileExpression(mvel);
+            this.mvel = mvel;
+        } catch (Exception e) {
+            log.warn("Unable to compile MVEL", e);
+        }
+    }
+
+//    public FormValidation doCheckMvel(@QueryParameter String mvel) {
+//        mvel = trimToNull(mvel);
+//        if (mvel == null) {
+//            return FormValidation.ok();
+//        }
+//        try {
+//            compileExpression(mvel);
+//            return FormValidation.ok();
+//        } catch (Exception e) {
+//            log.info("Unable to compile MVEL: " + mvel, e);
+//            return FormValidation.error(e, "Unable to compile MVEL");
+//        }
+//    }
+
+//    public Serializable getCompiledMvel() {
+//        return compiledMvel;
+//    }
+
+    public boolean matches(BuildRequest req) {
+        if (compiledMvel == null) {
+            return false;
+        }
+
+        Map<String, Map<String, String>> context = singletonMap("parameters", req.parameters);
+        Boolean b = MVEL.executeExpression(compiledMvel, context, Boolean.class);
+
+        return b != null && b;
+    }
+
+    @Extension
+    public static class DescriptorImpl extends TriggerDescriptor {
+
+        @Override
+        public boolean isApplicable(Item item) {
+            return item instanceof BuildableItem;
+        }
+
+        @Override
+        public String getDisplayName() {
+            return "ActiveMQ Trigger";
+        }
+    }
+}
diff --git a/src/main/java/org/jenkinsci/plugins/activemq/ActiveMqPlugin.java b/src/main/java/org/jenkinsci/plugins/activemq/ActiveMqPlugin.java
index c9c277c..cc73898 100644
--- a/src/main/java/org/jenkinsci/plugins/activemq/ActiveMqPlugin.java
+++ b/src/main/java/org/jenkinsci/plugins/activemq/ActiveMqPlugin.java
@@ -2,9 +2,12 @@ package org.jenkinsci.plugins.activemq;
 
 import hudson.Extension;
 import hudson.Plugin;
+import hudson.model.AbstractProject;
 import hudson.model.Build;
+import hudson.model.Cause;
 import hudson.model.TaskListener;
 import jenkins.model.GlobalConfiguration;
+import jenkins.model.Jenkins;
 import org.slf4j.Logger;
 
 import javax.annotation.Nonnull;
@@ -88,5 +91,29 @@ public class ActiveMqPlugin extends Plugin implements ActiveMqClient.BuildReques
     public void onBuildRequest(ActiveMqClient.BuildRequest req) {
         log.info("ActiveMqPlugin.onBuildRequest");
         log.info(req.parameters.toString());
+
+        for (AbstractProject project : Jenkins.getInstance().getAllItems(AbstractProject.class)) {
+            log.info("Checking project " + project.getDisplayName());
+            ActiveMqBuildTrigger trigger = (ActiveMqBuildTrigger) project.getTrigger(ActiveMqBuildTrigger.class);
+
+            if (trigger == null) {
+                log.debug("No trigger configured");
+                continue;
+            }
+
+            if (trigger.matches(req)) {
+                log.debug("MVEL matched!");
+                project.scheduleBuild(new ActiveMqCause());
+            } else {
+                log.debug("MVEL did not match");
+            }
+        }
+    }
+
+    public static class ActiveMqCause extends Cause {
+        @Override
+        public String getShortDescription() {
+            return "ActiveMQ cause";
+        }
     }
 }
diff --git a/src/main/resources/org/jenkinsci/plugins/activemq/ActiveMqBuildTrigger/config.jelly b/src/main/resources/org/jenkinsci/plugins/activemq/ActiveMqBuildTrigger/config.jelly
new file mode 100644
index 0000000..bcfde6e
--- /dev/null
+++ b/src/main/resources/org/jenkinsci/plugins/activemq/ActiveMqBuildTrigger/config.jelly
@@ -0,0 +1,6 @@
+<?jelly escape-by-default='true'?>
+<j:jelly xmlns:j="jelly:core" xmlns:st="jelly:stapler" xmlns:d="jelly:define" xmlns:l="/lib/layout" xmlns:t="/lib/hudson" xmlns:f="/lib/form">
+  <f:entry title="MVEL Expression" field="mvel">
+    <f:textarea />
+  </f:entry>
+</j:jelly>
-- 
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