From 97095971adc1267f10240f0bb980539ff7933b8e Mon Sep 17 00:00:00 2001
From: salimfadhley <sal@stodge.org>
Date: Fri, 14 Jun 2013 01:14:17 +0100
Subject: [PATCH] a more robust way to launch jenkins - intended to be used in
 the syslaunchers when running on remote CI

---
 jenkinsapi_utils/jenkins_launcher.py | 105 +++++++++++++++++++++++++++++++++++
 1 file changed, 105 insertions(+)
 create mode 100644 jenkinsapi_utils/jenkins_launcher.py

diff --git a/jenkinsapi_utils/jenkins_launcher.py b/jenkinsapi_utils/jenkins_launcher.py
new file mode 100644
index 0000000..be917e3
--- /dev/null
+++ b/jenkinsapi_utils/jenkins_launcher.py
@@ -0,0 +1,105 @@
+import os
+import time
+import shutil
+import logging
+import subprocess
+import tempfile
+import Queue
+import threading
+
+log = logging.getLogger(__name__)
+
+class FailedToStart(Exception): pass
+
+class TimeOut(Exception): pass
+
+class StreamThread(threading.Thread):
+
+    def __init__(self, name, q, stream, fn_log):
+        threading.Thread.__init__(self)
+        self.name = name
+        self.q = q
+        self.stream = stream
+        self.fn_log = fn_log
+
+    def run(self):
+        log.info("Starting %s", self.name)
+
+        while True:
+            line = self.stream.readline()
+            if line:
+                self.fn_log(line.rstrip())
+                self.q.put((self.name, line))
+            else:
+                break
+        self.q.put((self.name, None))
+
+class JenkinsLancher(object):
+    """
+    Launch jenkins
+    """
+    def __init__(self, war_path):
+        self.war_path = war_path
+        self.war_directory, self.war_filename = os.path.split(self.war_path)
+        self.jenkins_home = tempfile.mkdtemp(prefix='jenkins-home-')
+        self.jenkins_process = None
+        self.q = Queue.Queue()
+
+    def stop(self):
+        log.info("Shutting down jenkins.")
+        self.jenkins_process.terminate()
+        self.jenkins_process.wait()
+        shutil.rmtree(self.jenkins_home)
+
+    def start(self, timeout=30):
+        os.environ['JENKINS_HOME'] = self.jenkins_home
+        os.chdir(self.war_directory)
+
+        jenkins_command = 'java -jar %s' % self.war_filename
+
+        log.info("About to start Jenkins...")
+        log.info("%s> %s", os.getcwd(), jenkins_command)
+        self.jenkins_process = subprocess.Popen(
+            jenkins_command.split(), stdin=subprocess.PIPE,
+            stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+
+        threads = [
+            StreamThread('out', self.q, self.jenkins_process.stdout, log.info),
+            StreamThread('err', self.q, self.jenkins_process.stderr, log.warn)
+        ]
+
+        # Start the threads
+        for t in threads:
+            t.start()
+
+        while True:
+            try:
+                streamName, line = self.q.get(block=True, timeout=timeout)
+                if line:
+                    if 'Failed to initialize Jenkins' in line:
+                        raise FailedToStart(line)
+
+                    if 'is fully up and running' in line:
+                        log.info(line)
+                        return
+                else:
+                    log.warn('Stream %s has terminated', streamName)
+
+            except Queue.Empty:
+                print "unexpected end!"
+                break
+
+if __name__ == '__main__':
+    logging.basicConfig()
+    logging.getLogger('').setLevel(logging.INFO)
+
+    log.info("Hello!")
+
+    jl = JenkinsLancher('/home/sal/workspace/jenkinsapi/src/jenkinsapi_tests/systests/jenkins.war')
+    jl.start()
+    log.info("Jenkins was launched...")
+
+    time.sleep(30)
+
+    log.info("...now to shut it down!")
+    jl.stop()
-- 
2.7.4