Plugins/CheckerPlugins/SyntaxChecker/jsCheckSyntax.py

changeset 4231
0b38613388c9
parent 4021
195a471c327b
child 4236
8d4e498a7af8
diff -r 1117b60c1f9d -r 0b38613388c9 Plugins/CheckerPlugins/SyntaxChecker/jsCheckSyntax.py
--- a/Plugins/CheckerPlugins/SyntaxChecker/jsCheckSyntax.py	Tue Apr 21 19:47:31 2015 +0200
+++ b/Plugins/CheckerPlugins/SyntaxChecker/jsCheckSyntax.py	Wed Apr 22 19:53:58 2015 +0200
@@ -9,6 +9,7 @@
 """
 import os
 import sys
+import multiprocessing
 
 
 def initService():
@@ -21,7 +22,16 @@
     for i in range(4):
         path = os.path.dirname(path)
     sys.path.insert(2, os.path.join(path, "ThirdParty", "Jasy"))
-    return jsCheckSyntax
+    return jsSyntaxCheck
+
+
+def initBatchService():
+    """
+    Initialize the batch service and return the entry point.
+    
+    @return the entry point for the background client (function)
+    """
+    return jsSyntaxBatchCheck
 
 
 def normalizeCode(codestring):
@@ -46,7 +56,82 @@
     return codestring
 
 
-def jsCheckSyntax(file, codestring):
+def jsSyntaxCheck(file, codestring):
+    """
+    Function to check a Javascript source file for syntax errors.
+    
+    @param file source filename (string)
+    @param codestring string containing the code to check (string)
+    @return dictionary with the keys 'error' and 'warnings' which
+            hold a list containing details about the error/ warnings
+            (file name, line number, column, codestring (only at syntax
+            errors), the message, a list with arguments for the message)
+    """
+    return __jsSyntaxCheck(file, codestring)
+
+
+def jsSyntaxBatchCheck(argumentsList, send, fx, cancelled):
+    """
+    Module function to check syntax for a batch of files.
+    
+    @param argumentsList list of arguments tuples as given for 
+        syntaxAndPyflakesCheck
+    @param send reference to send function (function)
+    @param fx registered service name (string)
+    @param cancelled reference to function checking for a cancellation
+        (function)
+    """
+    try:
+        NumberOfProcesses = multiprocessing.cpu_count()
+        if NumberOfProcesses >= 1:
+            NumberOfProcesses -= 1
+    except NotImplementedError:
+        NumberOfProcesses = 1
+
+    # Create queues
+    taskQueue = multiprocessing.Queue()
+    doneQueue = multiprocessing.Queue()
+
+    # Submit tasks (initially two time number of processes
+    initialTasks = 2 * NumberOfProcesses
+    for task in argumentsList[:initialTasks]:
+        taskQueue.put(task)
+
+    # Start worker processes
+    for i in range(NumberOfProcesses):
+        multiprocessing.Process(target=worker, args=(taskQueue, doneQueue))\
+            .start()
+
+    # Get and send results
+    endIndex = len(argumentsList) - initialTasks
+    for i in range(len(argumentsList)):
+        filename, result = doneQueue.get()
+        send(fx, filename, result)
+        if cancelled():
+            # just exit the loop ignoring the results of queued tasks
+            break
+        if i < endIndex:
+            taskQueue.put(argumentsList[i + initialTasks])
+
+    # Tell child processes to stop
+    for i in range(NumberOfProcesses):
+        taskQueue.put('STOP')
+
+
+def worker(input, output):
+    """
+    Module function acting as the parallel worker for the style check.
+    
+    @param input input queue (multiprocessing.Queue)
+    @param output output queue (multiprocessing.Queue)
+    """
+    for filename, args in iter(input.get, 'STOP'):
+        source = args[0]
+        result = __jsSyntaxCheck(filename, source)
+        output.put((filename, result))
+
+
+def __jsSyntaxCheck(file, codestring):
     """
     Function to check a Javascript source file for syntax errors.
     

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