def __init__(self):
QMainWindow.__init__(self)
self.setupGUI()
self.job_monitor = HadoopJobMonitor()
class MainWindow(QMainWindow):
def __init__(self):
QMainWindow.__init__(self)
self.setupGUI()
self.job_monitor = HadoopJobMonitor()
def setupGUI(self):
layout = QGridLayout()
self.widget = QWidget()
self.widget.setLayout(layout)
self.setCentralWidget(self.widget)
self.setWindowTitle("Nutch Job Service")
# create active job list
active_label = QLabel("Active Hadoop Jobs")
layout.addWidget(active_label, 0, 0)
self.lv = QListView()
layout.addWidget(self.lv, 1, 0, 3, 1)
# Create buttons
self.stop_button = QPushButton("Stop")
self.refresh_button = QPushButton("Refresh")
button_layout = QVBoxLayout()
button_layout.addWidget(self.stop_button)
button_layout.addWidget(self.refresh_button)
layout.addLayout(button_layout, 1, 1)
# Start Button
self.new_job_layout = QHBoxLayout()
self.new_job_combo = QComboBox()
self.new_job_combo.addItems(["Inject", "Generate", "Fetch", "Parse", "Solr"])
self.new_job_button = QPushButton("Start New Job")
self.new_job_layout.addWidget(self.new_job_combo)
self.new_job_layout.addWidget(self.new_job_button)
layout.addLayout(self.new_job_layout, 5, 0)
# self.statusBar()
self.connectSlots()
def load_data(self):
"""
Loads data from the hadoop job list.
"""
self.showStatusMessage("Fetching Hadoop job list...")
print "Loading data..."
self.job_monitor.fetch_hadoop_job_info()
self.job_list_model = JobListModel(self.job_monitor, self)
self.lv.setModel(self.job_list_model)
self.updateStatusBar()
def start_new_nob(self):
"""
Starts a new job according to the selected item in combo box.
"""
current_text = self.new_job_combo.currentText()
print "Starting %s" % current_text
def stop_job(self):
current_item = self.lv.currentIndex().data(0).toString()
job_object = self.job_list_model.get_job_object(current_item)
job_object.stop()
def connectSlots(self):
"""
Connects signals to slots.
"""
self.connect(self.refresh_button, SIGNAL("clicked()"), self.load_data)
self.connect(self.stop_button, SIGNAL("clicked()"), self.stop_job)
self.connect(self.new_job_button, SIGNAL("clicked()"), self.start_new_nob)
def showStatusMessage(self, message):
self.statusBar().showMessage(message)
def updateStatusBar(self):
"""
Updates status bar according to the number of active hadoop jobs.
"""
self.statusBar().showMessage("%s jobs are active." % self.job_monitor.num_jobs)