# ====================================================================
#   Licensed under the Apache License, Version 2.0 (the "License");
#   you may not use this file except in compliance with the License.
#   You may obtain a copy of the License at
#
#       http://www.apache.org/licenses/LICENSE-2.0
#
#   Unless required by applicable law or agreed to in writing, software
#   distributed under the License is distributed on an "AS IS" BASIS,
#   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
#   See the License for the specific language governing permissions and
#   limitations under the License.
# ====================================================================

import sys, lucene, unittest
import time, threading
from lucene import getVMEnv
from PyLuceneTestCase import PyLuceneTestCase

from java.lang import Thread
from org.apache.lucene.analysis.standard import StandardAnalyzer
from org.apache.lucene.document import Document, Field, TextField
from org.apache.lucene.index import Term
from org.apache.lucene.search import TermQuery


class PyLuceneThreadTestCase(PyLuceneTestCase):
    """
    Test using threads in PyLucene with python threads
    """

    def setUp(self):
        super(PyLuceneThreadTestCase, self).setUp()

        self.classLoader = Thread.currentThread().getContextClassLoader()

        writer = self.getWriter(analyzer=StandardAnalyzer())

        doc1 = Document()
        doc2 = Document()
        doc3 = Document()
        doc4 = Document()
        doc1.add(Field("field", "one", TextField.TYPE_STORED))
        doc2.add(Field("field", "two", TextField.TYPE_STORED))
        doc3.add(Field("field", "three", TextField.TYPE_STORED))
        doc4.add(Field("field", "one", TextField.TYPE_STORED))

        writer.addDocument(doc1)
        writer.addDocument(doc2)
        writer.addDocument(doc3)
        writer.addDocument(doc4)
        writer.commit()
        writer.close()

        self.testData = [('one',2), ('two',1), ('three', 1), ('five', 0)] * 500
        self.lock = threading.Lock()
        self.totalQueries = 0

    def testWithMainThread(self):
        """ warm up test for runSearch in main thread """

        self.runSearch(2000, True)

    def testWithPyLuceneThread(self):
        """ Run 5 threads with 2000 queries each """

        threads = []
        for i in xrange(5):
            threads.append(threading.Thread(target=self.runSearch,
                                            args=(2000,)))

        for thread in threads:
            thread.start()

        for thread in threads:
            thread.join()

        # we survived!

        # and all queries have ran successfully
        self.assertEqual(10000, self.totalQueries)

    def runSearch(self, runCount, mainThread=False):
        """ search for runCount number of times """

        # problem: if there are any assertion errors in the child
        #   thread, the calling thread is not notified and may still
        #   consider the test case pass. We are using self.totalQueries
        #   to double check that work has actually been done.

        if not mainThread:
            getVMEnv().attachCurrentThread()
        time.sleep(0.5)

        searcher = self.getSearcher()
        try:
            for word, count in self.testData[0:runCount]:
                query = TermQuery(Term("field", word))
                topDocs = searcher.search(query, 50)
                self.assertEqual(topDocs.totalHits, count)

                self.lock.acquire()
                self.totalQueries += 1
                self.lock.release()
        finally:
            del searcher


if __name__ == "__main__":
    lucene.initVM(vmargs=['-Djava.awt.headless=true'])
    if '-loop' in sys.argv:
        sys.argv.remove('-loop')
        while True:
            try:
                unittest.main()
            except:
                pass
    else:
         unittest.main()