| """TestCases for distributed transactions. |
| """ |
| |
| import os |
| import time |
| import unittest |
| import weakref |
| |
| from test_all import db, test_support, have_threads, verbose, \ |
| get_new_environment_path, get_new_database_path |
| |
| |
| #---------------------------------------------------------------------- |
| |
| class DBReplicationManager(unittest.TestCase): |
| import sys |
| if sys.version_info[:3] < (2, 4, 0): |
| def assertTrue(self, expr, msg=None): |
| self.failUnless(expr,msg=msg) |
| |
| def setUp(self) : |
| self.homeDirMaster = get_new_environment_path() |
| self.homeDirClient = get_new_environment_path() |
| |
| self.dbenvMaster = db.DBEnv() |
| self.dbenvClient = db.DBEnv() |
| |
| # Must use "DB_THREAD" because the Replication Manager will |
| # be executed in other threads but will use the same environment. |
| # http://forums.oracle.com/forums/thread.jspa?threadID=645788&tstart=0 |
| self.dbenvMaster.open(self.homeDirMaster, db.DB_CREATE | db.DB_INIT_TXN |
| | db.DB_INIT_LOG | db.DB_INIT_MPOOL | db.DB_INIT_LOCK | |
| db.DB_INIT_REP | db.DB_RECOVER | db.DB_THREAD, 0666) |
| self.dbenvClient.open(self.homeDirClient, db.DB_CREATE | db.DB_INIT_TXN |
| | db.DB_INIT_LOG | db.DB_INIT_MPOOL | db.DB_INIT_LOCK | |
| db.DB_INIT_REP | db.DB_RECOVER | db.DB_THREAD, 0666) |
| |
| wr = weakref.ref(self) |
| self.confirmed_master=self.client_startupdone=False |
| def confirmed_master(a,b,c) : |
| if b==db.DB_EVENT_REP_MASTER : |
| self = wr() |
| self.confirmed_master=True |
| |
| def client_startupdone(a,b,c) : |
| if b==db.DB_EVENT_REP_STARTUPDONE : |
| self = wr() |
| self.client_startupdone=True |
| |
| self.dbenvMaster.set_event_notify(confirmed_master) |
| self.dbenvClient.set_event_notify(client_startupdone) |
| |
| #self.dbenvMaster.set_verbose(db.DB_VERB_REPLICATION, True) |
| #self.dbenvMaster.set_verbose(db.DB_VERB_FILEOPS_ALL, True) |
| #self.dbenvClient.set_verbose(db.DB_VERB_REPLICATION, True) |
| #self.dbenvClient.set_verbose(db.DB_VERB_FILEOPS_ALL, True) |
| |
| self.dbMaster = self.dbClient = None |
| |
| |
| def tearDown(self): |
| if self.dbClient : |
| self.dbClient.close() |
| if self.dbMaster : |
| self.dbMaster.close() |
| self.dbenvClient.close() |
| self.dbenvMaster.close() |
| test_support.rmtree(self.homeDirClient) |
| test_support.rmtree(self.homeDirMaster) |
| |
| def test01_basic_replication(self) : |
| master_port = test_support.find_unused_port() |
| self.dbenvMaster.repmgr_set_local_site("127.0.0.1", master_port) |
| client_port = test_support.find_unused_port() |
| self.dbenvClient.repmgr_set_local_site("127.0.0.1", client_port) |
| self.dbenvMaster.repmgr_add_remote_site("127.0.0.1", client_port) |
| self.dbenvClient.repmgr_add_remote_site("127.0.0.1", master_port) |
| self.dbenvMaster.rep_set_nsites(2) |
| self.dbenvClient.rep_set_nsites(2) |
| self.dbenvMaster.rep_set_priority(10) |
| self.dbenvClient.rep_set_priority(0) |
| |
| self.dbenvMaster.rep_set_timeout(db.DB_REP_CONNECTION_RETRY,100123) |
| self.dbenvClient.rep_set_timeout(db.DB_REP_CONNECTION_RETRY,100321) |
| self.assertEquals(self.dbenvMaster.rep_get_timeout( |
| db.DB_REP_CONNECTION_RETRY), 100123) |
| self.assertEquals(self.dbenvClient.rep_get_timeout( |
| db.DB_REP_CONNECTION_RETRY), 100321) |
| |
| self.dbenvMaster.rep_set_timeout(db.DB_REP_ELECTION_TIMEOUT, 100234) |
| self.dbenvClient.rep_set_timeout(db.DB_REP_ELECTION_TIMEOUT, 100432) |
| self.assertEquals(self.dbenvMaster.rep_get_timeout( |
| db.DB_REP_ELECTION_TIMEOUT), 100234) |
| self.assertEquals(self.dbenvClient.rep_get_timeout( |
| db.DB_REP_ELECTION_TIMEOUT), 100432) |
| |
| self.dbenvMaster.rep_set_timeout(db.DB_REP_ELECTION_RETRY, 100345) |
| self.dbenvClient.rep_set_timeout(db.DB_REP_ELECTION_RETRY, 100543) |
| self.assertEquals(self.dbenvMaster.rep_get_timeout( |
| db.DB_REP_ELECTION_RETRY), 100345) |
| self.assertEquals(self.dbenvClient.rep_get_timeout( |
| db.DB_REP_ELECTION_RETRY), 100543) |
| |
| self.dbenvMaster.repmgr_set_ack_policy(db.DB_REPMGR_ACKS_ALL) |
| self.dbenvClient.repmgr_set_ack_policy(db.DB_REPMGR_ACKS_ALL) |
| |
| self.dbenvMaster.repmgr_start(1, db.DB_REP_MASTER); |
| self.dbenvClient.repmgr_start(1, db.DB_REP_CLIENT); |
| |
| self.assertEquals(self.dbenvMaster.rep_get_nsites(),2) |
| self.assertEquals(self.dbenvClient.rep_get_nsites(),2) |
| self.assertEquals(self.dbenvMaster.rep_get_priority(),10) |
| self.assertEquals(self.dbenvClient.rep_get_priority(),0) |
| self.assertEquals(self.dbenvMaster.repmgr_get_ack_policy(), |
| db.DB_REPMGR_ACKS_ALL) |
| self.assertEquals(self.dbenvClient.repmgr_get_ack_policy(), |
| db.DB_REPMGR_ACKS_ALL) |
| |
| # The timeout is necessary in BDB 4.5, since DB_EVENT_REP_STARTUPDONE |
| # is not generated if the master has no new transactions. |
| # This is solved in BDB 4.6 (#15542). |
| import time |
| timeout = time.time()+60 |
| while (time.time()<timeout) and not (self.confirmed_master and self.client_startupdone) : |
| time.sleep(0.02) |
| # self.client_startupdone does not always get set to True within |
| # the timeout. On windows this may be a deep issue, on other |
| # platforms it is likely just a timing issue, especially on slow |
| # virthost buildbots (see issue 3892 for more). Even though |
| # the timeout triggers, the rest of this test method usually passes |
| # (but not all of it always, see below). So we just note the |
| # timeout on stderr and keep soldering on. |
| if time.time()>timeout: |
| import sys |
| print >> sys.stderr, ("XXX: timeout happened before" |
| "startup was confirmed - see issue 3892") |
| startup_timeout = True |
| |
| d = self.dbenvMaster.repmgr_site_list() |
| self.assertEquals(len(d), 1) |
| self.assertEquals(d[0][0], "127.0.0.1") |
| self.assertEquals(d[0][1], client_port) |
| self.assertTrue((d[0][2]==db.DB_REPMGR_CONNECTED) or \ |
| (d[0][2]==db.DB_REPMGR_DISCONNECTED)) |
| |
| d = self.dbenvClient.repmgr_site_list() |
| self.assertEquals(len(d), 1) |
| self.assertEquals(d[0][0], "127.0.0.1") |
| self.assertEquals(d[0][1], master_port) |
| self.assertTrue((d[0][2]==db.DB_REPMGR_CONNECTED) or \ |
| (d[0][2]==db.DB_REPMGR_DISCONNECTED)) |
| |
| if db.version() >= (4,6) : |
| d = self.dbenvMaster.repmgr_stat(flags=db.DB_STAT_CLEAR); |
| self.assertTrue("msgs_queued" in d) |
| |
| self.dbMaster=db.DB(self.dbenvMaster) |
| txn=self.dbenvMaster.txn_begin() |
| self.dbMaster.open("test", db.DB_HASH, db.DB_CREATE, 0666, txn=txn) |
| txn.commit() |
| |
| import time,os.path |
| timeout=time.time()+10 |
| while (time.time()<timeout) and \ |
| not (os.path.exists(os.path.join(self.homeDirClient,"test"))) : |
| time.sleep(0.01) |
| |
| self.dbClient=db.DB(self.dbenvClient) |
| while True : |
| txn=self.dbenvClient.txn_begin() |
| try : |
| self.dbClient.open("test", db.DB_HASH, flags=db.DB_RDONLY, |
| mode=0666, txn=txn) |
| except db.DBRepHandleDeadError : |
| txn.abort() |
| self.dbClient.close() |
| self.dbClient=db.DB(self.dbenvClient) |
| continue |
| |
| txn.commit() |
| break |
| |
| txn=self.dbenvMaster.txn_begin() |
| self.dbMaster.put("ABC", "123", txn=txn) |
| txn.commit() |
| import time |
| timeout=time.time()+10 |
| v=None |
| while (time.time()<timeout) and (v==None) : |
| txn=self.dbenvClient.txn_begin() |
| v=self.dbClient.get("ABC", txn=txn) |
| txn.commit() |
| if v==None : |
| time.sleep(0.02) |
| # If startup did not happen before the timeout above, then this test |
| # sometimes fails. This happens randomly, which causes buildbot |
| # instability, but all the other bsddb tests pass. Since bsddb3 in the |
| # stdlib is currently not getting active maintenance, and is gone in |
| # py3k, we just skip the end of the test in that case. |
| if time.time()>=timeout and startup_timeout: |
| self.skipTest("replication test skipped due to random failure, " |
| "see issue 3892") |
| self.assertTrue(time.time()<timeout) |
| self.assertEquals("123", v) |
| |
| txn=self.dbenvMaster.txn_begin() |
| self.dbMaster.delete("ABC", txn=txn) |
| txn.commit() |
| timeout=time.time()+10 |
| while (time.time()<timeout) and (v!=None) : |
| txn=self.dbenvClient.txn_begin() |
| v=self.dbClient.get("ABC", txn=txn) |
| txn.commit() |
| if v==None : |
| time.sleep(0.02) |
| self.assertTrue(time.time()<timeout) |
| self.assertEquals(None, v) |
| |
| class DBBaseReplication(DBReplicationManager): |
| def setUp(self) : |
| DBReplicationManager.setUp(self) |
| wr = weakref.ref(self) |
| def confirmed_master(a,b,c) : |
| if (b == db.DB_EVENT_REP_MASTER) or (b == db.DB_EVENT_REP_ELECTED) : |
| self = wr() |
| self.confirmed_master = True |
| |
| def client_startupdone(a,b,c) : |
| if b == db.DB_EVENT_REP_STARTUPDONE : |
| self = wr() |
| self.client_startupdone = True |
| |
| self.dbenvMaster.set_event_notify(confirmed_master) |
| self.dbenvClient.set_event_notify(client_startupdone) |
| |
| import Queue |
| self.m2c = Queue.Queue() |
| self.c2m = Queue.Queue() |
| |
| # There are only two nodes, so we don't need to |
| # do any routing decision |
| def m2c(dbenv, control, rec, lsnp, envid, flags) : |
| self = wr() |
| self.m2c.put((control, rec)) |
| |
| def c2m(dbenv, control, rec, lsnp, envid, flags) : |
| self = wr() |
| self.c2m.put((control, rec)) |
| |
| self.dbenvMaster.rep_set_transport(13,m2c) |
| self.dbenvMaster.rep_set_priority(10) |
| self.dbenvClient.rep_set_transport(3,c2m) |
| self.dbenvClient.rep_set_priority(0) |
| |
| self.assertEquals(self.dbenvMaster.rep_get_priority(),10) |
| self.assertEquals(self.dbenvClient.rep_get_priority(),0) |
| |
| #self.dbenvMaster.set_verbose(db.DB_VERB_REPLICATION, True) |
| #self.dbenvMaster.set_verbose(db.DB_VERB_FILEOPS_ALL, True) |
| #self.dbenvClient.set_verbose(db.DB_VERB_REPLICATION, True) |
| #self.dbenvClient.set_verbose(db.DB_VERB_FILEOPS_ALL, True) |
| |
| def thread_master() : |
| self = wr() |
| return self.thread_do(self.dbenvMaster, self.c2m, 3, |
| self.master_doing_election, True) |
| |
| def thread_client() : |
| self = wr() |
| return self.thread_do(self.dbenvClient, self.m2c, 13, |
| self.client_doing_election, False) |
| |
| from threading import Thread |
| t_m=Thread(target=thread_master) |
| t_c=Thread(target=thread_client) |
| import sys |
| if sys.version_info[0] < 3 : |
| t_m.setDaemon(True) |
| t_c.setDaemon(True) |
| else : |
| t_m.daemon = True |
| t_c.daemon = True |
| |
| self.t_m = t_m |
| self.t_c = t_c |
| |
| self.dbMaster = self.dbClient = None |
| |
| self.master_doing_election=[False] |
| self.client_doing_election=[False] |
| |
| |
| def tearDown(self): |
| if self.dbClient : |
| self.dbClient.close() |
| if self.dbMaster : |
| self.dbMaster.close() |
| self.m2c.put(None) |
| self.c2m.put(None) |
| self.t_m.join() |
| self.t_c.join() |
| self.dbenvClient.close() |
| self.dbenvMaster.close() |
| test_support.rmtree(self.homeDirClient) |
| test_support.rmtree(self.homeDirMaster) |
| |
| def basic_rep_threading(self) : |
| self.dbenvMaster.rep_start(flags=db.DB_REP_MASTER) |
| self.dbenvClient.rep_start(flags=db.DB_REP_CLIENT) |
| |
| def thread_do(env, q, envid, election_status, must_be_master) : |
| while True : |
| v=q.get() |
| if v == None : return |
| env.rep_process_message(v[0], v[1], envid) |
| |
| self.thread_do = thread_do |
| |
| self.t_m.start() |
| self.t_c.start() |
| |
| def test01_basic_replication(self) : |
| self.basic_rep_threading() |
| |
| # The timeout is necessary in BDB 4.5, since DB_EVENT_REP_STARTUPDONE |
| # is not generated if the master has no new transactions. |
| # This is solved in BDB 4.6 (#15542). |
| import time |
| timeout = time.time()+60 |
| while (time.time()<timeout) and not (self.confirmed_master and |
| self.client_startupdone) : |
| time.sleep(0.02) |
| self.assertTrue(time.time()<timeout) |
| |
| self.dbMaster=db.DB(self.dbenvMaster) |
| txn=self.dbenvMaster.txn_begin() |
| self.dbMaster.open("test", db.DB_HASH, db.DB_CREATE, 0666, txn=txn) |
| txn.commit() |
| |
| import time,os.path |
| timeout=time.time()+10 |
| while (time.time()<timeout) and \ |
| not (os.path.exists(os.path.join(self.homeDirClient,"test"))) : |
| time.sleep(0.01) |
| |
| self.dbClient=db.DB(self.dbenvClient) |
| while True : |
| txn=self.dbenvClient.txn_begin() |
| try : |
| self.dbClient.open("test", db.DB_HASH, flags=db.DB_RDONLY, |
| mode=0666, txn=txn) |
| except db.DBRepHandleDeadError : |
| txn.abort() |
| self.dbClient.close() |
| self.dbClient=db.DB(self.dbenvClient) |
| continue |
| |
| txn.commit() |
| break |
| |
| txn=self.dbenvMaster.txn_begin() |
| self.dbMaster.put("ABC", "123", txn=txn) |
| txn.commit() |
| import time |
| timeout=time.time()+10 |
| v=None |
| while (time.time()<timeout) and (v==None) : |
| txn=self.dbenvClient.txn_begin() |
| v=self.dbClient.get("ABC", txn=txn) |
| txn.commit() |
| if v==None : |
| time.sleep(0.02) |
| self.assertTrue(time.time()<timeout) |
| self.assertEquals("123", v) |
| |
| txn=self.dbenvMaster.txn_begin() |
| self.dbMaster.delete("ABC", txn=txn) |
| txn.commit() |
| timeout=time.time()+10 |
| while (time.time()<timeout) and (v!=None) : |
| txn=self.dbenvClient.txn_begin() |
| v=self.dbClient.get("ABC", txn=txn) |
| txn.commit() |
| if v==None : |
| time.sleep(0.02) |
| self.assertTrue(time.time()<timeout) |
| self.assertEquals(None, v) |
| |
| if db.version() >= (4,7) : |
| def test02_test_request(self) : |
| self.basic_rep_threading() |
| (minimum, maximum) = self.dbenvClient.rep_get_request() |
| self.dbenvClient.rep_set_request(minimum-1, maximum+1) |
| self.assertEqual(self.dbenvClient.rep_get_request(), |
| (minimum-1, maximum+1)) |
| |
| if db.version() >= (4,6) : |
| def test03_master_election(self) : |
| # Get ready to hold an election |
| #self.dbenvMaster.rep_start(flags=db.DB_REP_MASTER) |
| self.dbenvMaster.rep_start(flags=db.DB_REP_CLIENT) |
| self.dbenvClient.rep_start(flags=db.DB_REP_CLIENT) |
| |
| def thread_do(env, q, envid, election_status, must_be_master) : |
| while True : |
| v=q.get() |
| if v == None : return |
| r = env.rep_process_message(v[0],v[1],envid) |
| if must_be_master and self.confirmed_master : |
| self.dbenvMaster.rep_start(flags = db.DB_REP_MASTER) |
| must_be_master = False |
| |
| if r[0] == db.DB_REP_HOLDELECTION : |
| def elect() : |
| while True : |
| try : |
| env.rep_elect(2, 1) |
| election_status[0] = False |
| break |
| except db.DBRepUnavailError : |
| pass |
| |
| if not election_status[0] and not self.confirmed_master : |
| from threading import Thread |
| election_status[0] = True |
| t=Thread(target=elect) |
| import sys |
| if sys.version_info[0] < 3 : |
| t.setDaemon(True) |
| else : |
| t.daemon = True |
| t.start() |
| |
| self.thread_do = thread_do |
| |
| self.t_m.start() |
| self.t_c.start() |
| |
| self.dbenvMaster.rep_set_timeout(db.DB_REP_ELECTION_TIMEOUT, 50000) |
| self.dbenvClient.rep_set_timeout(db.DB_REP_ELECTION_TIMEOUT, 50000) |
| self.client_doing_election[0] = True |
| while True : |
| try : |
| self.dbenvClient.rep_elect(2, 1) |
| self.client_doing_election[0] = False |
| break |
| except db.DBRepUnavailError : |
| pass |
| |
| self.assertTrue(self.confirmed_master) |
| |
| #---------------------------------------------------------------------- |
| |
| def test_suite(): |
| suite = unittest.TestSuite() |
| if db.version() >= (4, 6) : |
| dbenv = db.DBEnv() |
| try : |
| dbenv.repmgr_get_ack_policy() |
| ReplicationManager_available=True |
| except : |
| ReplicationManager_available=False |
| dbenv.close() |
| del dbenv |
| if ReplicationManager_available : |
| suite.addTest(unittest.makeSuite(DBReplicationManager)) |
| |
| if have_threads : |
| suite.addTest(unittest.makeSuite(DBBaseReplication)) |
| |
| return suite |
| |
| |
| if __name__ == '__main__': |
| unittest.main(defaultTest='test_suite') |
