func (s *S) TestPrimaryShutdownOnAuthShard(c *C) {
if *fast {
c.Skip("-fast")
}
// Dial the shard.
session, err := mgo.Dial("localhost:40203")
c.Assert(err, IsNil)
defer session.Close()
// Login and insert something to make it more realistic.
session.DB("admin").Login("root", "rapadura")
coll := session.DB("mydb").C("mycoll")
err = coll.Insert(bson.M{"n": 1})
c.Assert(err, IsNil)
// Dial the replica set to figure the master out.
rs, err := mgo.Dial("root:rapadura@localhost:40031")
c.Assert(err, IsNil)
defer rs.Close()
// With strong consistency, this will open a socket to the master.
result := &struct{ Host string }{}
err = rs.Run("serverStatus", result)
c.Assert(err, IsNil)
// Kill the master.
host := result.Host
s.Stop(host)
// This must fail, since the connection was broken.
err = rs.Run("serverStatus", result)
c.Assert(err, Equals, io.EOF)
// This won't work because the master just died.
err = coll.Insert(bson.M{"n": 2})
c.Assert(err, NotNil)
// Refresh session and wait for re-election.
session.Refresh()
for i := 0; i < 60; i++ {
err = coll.Insert(bson.M{"n": 3})
if err == nil {
break
}
c.Logf("Waiting for replica set to elect a new master. Last error: %v", err)
time.Sleep(500 * time.Millisecond)
}
c.Assert(err, IsNil)
count, err := coll.Count()
c.Assert(count > 1, Equals, true)
}
func (s *S) TestSetModeMonotonicAfterStrong(c *C) {
// Test that a strong session shifting to a monotonic
// one preserves the socket untouched.
session, err := mgo.Dial("localhost:40012")
c.Assert(err, IsNil)
defer session.Close()
// Insert something to force a connection to the master.
coll := session.DB("mydb").C("mycoll")
err = coll.Insert(M{"a": 1})
c.Assert(err, IsNil)
session.SetMode(mgo.Monotonic, false)
// Wait since the sync also uses sockets.
for len(session.LiveServers()) != 3 {
c.Log("Waiting for cluster sync to finish...")
time.Sleep(5e8)
}
// Master socket should still be reserved.
stats := mgo.GetStats()
c.Assert(stats.SocketsInUse, Equals, 1)
// Confirm it's the master even though it's Monotonic by now.
result := M{}
cmd := session.DB("admin").C("$cmd")
err = cmd.Find(M{"ismaster": 1}).One(&result)
c.Assert(err, IsNil)
c.Assert(result["ismaster"], Equals, true)
}
func (s *S) TestSelectServers(c *C) {
if !s.versionAtLeast(2, 2) {
c.Skip("read preferences introduced in 2.2")
}
session, err := mgo.Dial("localhost:40011")
c.Assert(err, IsNil)
defer session.Close()
session.SetMode(mgo.Eventual, true)
var result struct{ Host string }
session.Refresh()
session.SelectServers(bson.D{{"rs1", "b"}})
err = session.Run("serverStatus", &result)
c.Assert(err, IsNil)
c.Assert(hostPort(result.Host), Equals, "40012")
session.Refresh()
session.SelectServers(bson.D{{"rs1", "c"}})
err = session.Run("serverStatus", &result)
c.Assert(err, IsNil)
c.Assert(hostPort(result.Host), Equals, "40013")
}
func (s *S) TestGridFSRemove(c *C) {
session, err := mgo.Dial("localhost:40011")
c.Assert(err, IsNil)
defer session.Close()
db := session.DB("mydb")
gfs := db.GridFS("fs")
file, err := gfs.Create("myfile.txt")
c.Assert(err, IsNil)
file.Write([]byte{'1'})
file.Close()
file, err = gfs.Create("myfile.txt")
c.Assert(err, IsNil)
file.Write([]byte{'2'})
file.Close()
err = gfs.Remove("myfile.txt")
c.Assert(err, IsNil)
_, err = gfs.Open("myfile.txt")
c.Assert(err == mgo.ErrNotFound, Equals, true)
n, err := db.C("fs.chunks").Find(nil).Count()
c.Assert(err, IsNil)
c.Assert(n, Equals, 0)
}
func (s *S) TestTopologySyncWithSlaveSeed(c *C) {
// That's supposed to be a slave. Must run discovery
// and find out master to insert successfully.
session, err := mgo.Dial("localhost:40012")
c.Assert(err, IsNil)
defer session.Close()
coll := session.DB("mydb").C("mycoll")
coll.Insert(M{"a": 1, "b": 2})
result := struct{ Ok bool }{}
err = session.Run("getLastError", &result)
c.Assert(err, IsNil)
c.Assert(result.Ok, Equals, true)
// One connection to each during discovery. Master
// socket recycled for insert.
stats := mgo.GetStats()
c.Assert(stats.MasterConns, Equals, 1)
c.Assert(stats.SlaveConns, Equals, 2)
// Only one socket reference alive, in the master socket owned
// by the above session.
c.Assert(stats.SocketsInUse, Equals, 1)
// Refresh it, and it must be gone.
session.Refresh()
stats = mgo.GetStats()
c.Assert(stats.SocketsInUse, Equals, 0)
}
func (s *S) TestDirectToUnknownStateMember(c *C) {
session, err := mgo.Dial("localhost:40041?connect=direct")
c.Assert(err, IsNil)
defer session.Close()
session.SetMode(mgo.Monotonic, true)
result := &struct{ Host string }{}
err = session.Run("serverStatus", result)
c.Assert(err, IsNil)
c.Assert(strings.HasSuffix(result.Host, ":40041"), Equals, true)
// We've got no master, so it'll timeout.
session.SetSyncTimeout(5e8 * time.Nanosecond)
coll := session.DB("mydb").C("mycoll")
err = coll.Insert(M{"test": 1})
c.Assert(err, ErrorMatches, "no reachable servers")
// Slave is still reachable.
result.Host = ""
err = session.Run("serverStatus", result)
c.Assert(err, IsNil)
c.Assert(strings.HasSuffix(result.Host, ":40041"), Equals, true)
}
func (s *S) TestGridFSOpen(c *C) {
session, err := mgo.Dial("localhost:40011")
c.Assert(err, IsNil)
defer session.Close()
db := session.DB("mydb")
gfs := db.GridFS("fs")
file, err := gfs.Create("myfile.txt")
c.Assert(err, IsNil)
file.Write([]byte{'1'})
file.Close()
file, err = gfs.Create("myfile.txt")
c.Assert(err, IsNil)
file.Write([]byte{'2'})
file.Close()
file, err = gfs.Open("myfile.txt")
c.Assert(err, IsNil)
defer file.Close()
var b [1]byte
_, err = file.Read(b[:])
c.Assert(err, IsNil)
c.Assert(string(b[:]), Equals, "2")
}
func (s *S) TestGridFSReadChunking(c *C) {
session, err := mgo.Dial("localhost:40011")
c.Assert(err, IsNil)
defer session.Close()
db := session.DB("mydb")
gfs := db.GridFS("fs")
file, err := gfs.Create("")
c.Assert(err, IsNil)
id := file.Id()
file.SetChunkSize(5)
n, err := file.Write([]byte("abcdefghijklmnopqrstuv"))
c.Assert(err, IsNil)
c.Assert(n, Equals, 22)
err = file.Close()
c.Assert(err, IsNil)
file, err = gfs.OpenId(id)
c.Assert(err, IsNil)
b := make([]byte, 30)
// Smaller than the chunk size.
n, err = file.Read(b[:3])
c.Assert(err, IsNil)
c.Assert(n, Equals, 3)
c.Assert(b[:3], DeepEquals, []byte("abc"))
// Boundary in the middle.
n, err = file.Read(b[:4])
c.Assert(err, IsNil)
c.Assert(n, Equals, 4)
c.Assert(b[:4], DeepEquals, []byte("defg"))
// Boundary at the end.
n, err = file.Read(b[:3])
c.Assert(err, IsNil)
c.Assert(n, Equals, 3)
c.Assert(b[:3], DeepEquals, []byte("hij"))
// Larger than the chunk size, with 3 chunks.
n, err = file.Read(b)
c.Assert(err, IsNil)
c.Assert(n, Equals, 12)
c.Assert(b[:12], DeepEquals, []byte("klmnopqrstuv"))
n, err = file.Read(b)
c.Assert(n, Equals, 0)
c.Assert(err == io.EOF, Equals, true)
err = file.Close()
c.Assert(err, IsNil)
}
func (s *S) TestGridFSOpenNext(c *C) {
session, err := mgo.Dial("localhost:40011")
c.Assert(err, IsNil)
defer session.Close()
db := session.DB("mydb")
gfs := db.GridFS("fs")
file, err := gfs.Create("myfile1.txt")
c.Assert(err, IsNil)
file.Write([]byte{'1'})
file.Close()
file, err = gfs.Create("myfile2.txt")
c.Assert(err, IsNil)
file.Write([]byte{'2'})
file.Close()
var f *mgo.GridFile
var b [1]byte
iter := gfs.Find(nil).Sort("-filename").Iter()
ok := gfs.OpenNext(iter, &f)
c.Assert(ok, Equals, true)
c.Check(f.Name(), Equals, "myfile2.txt")
_, err = f.Read(b[:])
c.Assert(err, IsNil)
c.Assert(string(b[:]), Equals, "2")
ok = gfs.OpenNext(iter, &f)
c.Assert(ok, Equals, true)
c.Check(f.Name(), Equals, "myfile1.txt")
_, err = f.Read(b[:])
c.Assert(err, IsNil)
c.Assert(string(b[:]), Equals, "1")
ok = gfs.OpenNext(iter, &f)
c.Assert(ok, Equals, false)
c.Assert(iter.Close(), IsNil)
c.Assert(f, IsNil)
// Do it again with a more restrictive query to make sure
// it's actually taken into account.
iter = gfs.Find(bson.M{"filename": "myfile1.txt"}).Iter()
ok = gfs.OpenNext(iter, &f)
c.Assert(ok, Equals, true)
c.Check(f.Name(), Equals, "myfile1.txt")
ok = gfs.OpenNext(iter, &f)
c.Assert(ok, Equals, false)
c.Assert(iter.Close(), IsNil)
c.Assert(f, IsNil)
}
func (s *S) TestSetModeEventualIterBug(c *C) {
session1, err := mgo.Dial("localhost:40011")
c.Assert(err, IsNil)
defer session1.Close()
session1.SetMode(mgo.Eventual, false)
coll1 := session1.DB("mydb").C("mycoll")
const N = 100
for i := 0; i < N; i++ {
err = coll1.Insert(M{"_id": i})
c.Assert(err, IsNil)
}
c.Logf("Waiting until secondary syncs")
for {
n, err := coll1.Count()
c.Assert(err, IsNil)
if n == N {
c.Logf("Found all")
break
}
}
session2, err := mgo.Dial("localhost:40011")
c.Assert(err, IsNil)
defer session2.Close()
session2.SetMode(mgo.Eventual, false)
coll2 := session2.DB("mydb").C("mycoll")
i := 0
iter := coll2.Find(nil).Batch(10).Iter()
var result struct{}
for iter.Next(&result) {
i++
}
c.Assert(iter.Close(), Equals, nil)
c.Assert(i, Equals, N)
}
func (s *S) SetUpSuite(c *C) {
mgo.SetDebug(true)
mgo.SetStats(true)
s.StartAll()
session, err := mgo.Dial("localhost:40001")
c.Assert(err, IsNil)
s.build, err = session.BuildInfo()
c.Check(err, IsNil)
session.Close()
}
func getOpCounters(server string) (c *OpCounters, err error) {
session, err := mgo.Dial(server + "?connect=direct")
if err != nil {
return nil, err
}
defer session.Close()
session.SetMode(mgo.Monotonic, true)
result := struct{ OpCounters }{}
err = session.Run("serverStatus", &result)
return &result.OpCounters, err
}
func (s *S) TestNewSession(c *C) {
session, err := mgo.Dial("localhost:40001")
c.Assert(err, IsNil)
defer session.Close()
// Do a dummy operation to wait for connection.
coll := session.DB("mydb").C("mycoll")
err = coll.Insert(M{"_id": 1})
c.Assert(err, IsNil)
// Tweak safety and query settings to ensure other has copied those.
session.SetSafe(nil)
session.SetBatch(-1)
other := session.New()
defer other.Close()
session.SetSafe(&mgo.Safe{})
// Clone was copied while session was unsafe, so no errors.
otherColl := other.DB("mydb").C("mycoll")
err = otherColl.Insert(M{"_id": 1})
c.Assert(err, IsNil)
// Original session was made safe again.
err = coll.Insert(M{"_id": 1})
c.Assert(err, NotNil)
// With New(), each session has its own socket now.
stats := mgo.GetStats()
c.Assert(stats.MasterConns, Equals, 2)
c.Assert(stats.SocketsInUse, Equals, 2)
// Ensure query parameters were cloned.
err = otherColl.Insert(M{"_id": 2})
c.Assert(err, IsNil)
// Ping the database to ensure the nonce has been received already.
c.Assert(other.Ping(), IsNil)
mgo.ResetStats()
iter := otherColl.Find(M{}).Iter()
c.Assert(err, IsNil)
m := M{}
ok := iter.Next(m)
c.Assert(ok, Equals, true)
err = iter.Close()
c.Assert(err, IsNil)
// If Batch(-1) is in effect, a single document must have been received.
stats = mgo.GetStats()
c.Assert(stats.ReceivedDocs, Equals, 1)
}
func (s *S) TestPrimaryHiccup(c *C) {
if *fast {
c.Skip("-fast")
}
session, err := mgo.Dial("localhost:40021")
c.Assert(err, IsNil)
defer session.Close()
// With strong consistency, this will open a socket to the master.
result := &struct{ Host string }{}
err = session.Run("serverStatus", result)
c.Assert(err, IsNil)
// Establish a few extra sessions to create spare sockets to
// the master. This increases a bit the chances of getting an
// incorrect cached socket.
var sessions []*mgo.Session
for i := 0; i < 20; i++ {
sessions = append(sessions, session.Copy())
err = sessions[len(sessions)-1].Run("serverStatus", result)
c.Assert(err, IsNil)
}
for i := range sessions {
sessions[i].Close()
}
// Kill the master, but bring it back immediatelly.
host := result.Host
s.Stop(host)
s.StartAll()
// This must fail, since the connection was broken.
err = session.Run("serverStatus", result)
c.Assert(err, Equals, io.EOF)
// With strong consistency, it fails again until reset.
err = session.Run("serverStatus", result)
c.Assert(err, Equals, io.EOF)
session.Refresh()
// Now we should be able to talk to the new master.
// Increase the timeout since this may take quite a while.
session.SetSyncTimeout(3 * time.Minute)
// Insert some data to confirm it's indeed a master.
err = session.DB("mydb").C("mycoll").Insert(M{"n": 42})
c.Assert(err, IsNil)
}
func (s *S) TestPreserveSocketCountOnSync(c *C) {
if *fast {
c.Skip("-fast")
}
session, err := mgo.Dial("localhost:40011")
c.Assert(err, IsNil)
defer session.Close()
stats := mgo.GetStats()
for stats.MasterConns+stats.SlaveConns != 3 {
stats = mgo.GetStats()
c.Log("Waiting for all connections to be established...")
time.Sleep(5e8)
}
c.Assert(stats.SocketsAlive, Equals, 3)
// Kill the master (with rs1, 'a' is always the master).
s.Stop("localhost:40011")
// Wait for the logic to run for a bit and bring it back.
go func() {
time.Sleep(5e9)
s.StartAll()
}()
// Do an action to kick the resync logic in, and also to
// wait until the cluster recognizes the server is back.
result := struct{ Ok bool }{}
err = session.Run("getLastError", &result)
c.Assert(err, IsNil)
c.Assert(result.Ok, Equals, true)
for i := 0; i != 20; i++ {
stats = mgo.GetStats()
if stats.SocketsAlive == 3 {
break
}
c.Logf("Waiting for 3 sockets alive, have %d", stats.SocketsAlive)
time.Sleep(5e8)
}
// Ensure the number of sockets is preserved after syncing.
stats = mgo.GetStats()
c.Assert(stats.SocketsAlive, Equals, 3)
c.Assert(stats.SocketsInUse, Equals, 1)
c.Assert(stats.SocketRefs, Equals, 1)
}
func (s *S) TestGridFSOpenNotFound(c *C) {
session, err := mgo.Dial("localhost:40011")
c.Assert(err, IsNil)
defer session.Close()
db := session.DB("mydb")
gfs := db.GridFS("fs")
file, err := gfs.OpenId("non-existent")
c.Assert(err == mgo.ErrNotFound, Equals, true)
c.Assert(file, IsNil)
file, err = gfs.Open("non-existent")
c.Assert(err == mgo.ErrNotFound, Equals, true)
c.Assert(file, IsNil)
}
func (s *S) TestSetModeMonotonicWriteOnIteration(c *C) {
// Must necessarily connect to a slave, otherwise the
// master connection will be available first.
session, err := mgo.Dial("localhost:40012")
c.Assert(err, IsNil)
defer session.Close()
session.SetMode(mgo.Monotonic, false)
c.Assert(session.Mode(), Equals, mgo.Monotonic)
coll1 := session.DB("mydb").C("mycoll1")
coll2 := session.DB("mydb").C("mycoll2")
ns := []int{40, 41, 42, 43, 44, 45, 46}
for _, n := range ns {
err := coll1.Insert(M{"n": n})
c.Assert(err, IsNil)
}
// Release master so we can grab a slave again.
session.Refresh()
// Wait until synchronization is done.
for {
n, err := coll1.Count()
c.Assert(err, IsNil)
if n == len(ns) {
break
}
}
iter := coll1.Find(nil).Batch(2).Iter()
i := 0
m := M{}
for iter.Next(&m) {
i++
if i > 3 {
err := coll2.Insert(M{"n": 47 + i})
c.Assert(err, IsNil)
}
}
c.Assert(i, Equals, len(ns))
}
func (s *S) TestSocketLimit(c *C) {
if *fast {
c.Skip("-fast")
}
const socketLimit = 64
restore := mgo.HackSocketsPerServer(socketLimit)
defer restore()
session, err := mgo.Dial("localhost:40011")
c.Assert(err, IsNil)
defer session.Close()
stats := mgo.GetStats()
for stats.MasterConns+stats.SlaveConns != 3 {
stats = mgo.GetStats()
c.Log("Waiting for all connections to be established...")
time.Sleep(5e8)
}
c.Assert(stats.SocketsAlive, Equals, 3)
// Consume the whole limit for the master.
var master []*mgo.Session
for i := 0; i < socketLimit; i++ {
s := session.Copy()
defer s.Close()
err := s.Ping()
c.Assert(err, IsNil)
master = append(master, s)
}
before := time.Now()
go func() {
time.Sleep(3e9)
master[0].Refresh()
}()
// Now a single ping must block, since it would need another
// connection to the master, over the limit. Once the goroutine
// above releases its socket, it should move on.
session.Ping()
delay := time.Now().Sub(before)
c.Assert(delay > 3e9, Equals, true)
c.Assert(delay < 6e9, Equals, true)
}
func (s *S) TestDirect(c *C) {
session, err := mgo.Dial("localhost:40012?connect=direct")
c.Assert(err, IsNil)
defer session.Close()
// We know that server is a slave.
session.SetMode(mgo.Monotonic, true)
result := &struct{ Host string }{}
err = session.Run("serverStatus", result)
c.Assert(err, IsNil)
c.Assert(strings.HasSuffix(result.Host, ":40012"), Equals, true)
stats := mgo.GetStats()
c.Assert(stats.SocketsAlive, Equals, 1)
c.Assert(stats.SocketsInUse, Equals, 1)
c.Assert(stats.SocketRefs, Equals, 1)
// We've got no master, so it'll timeout.
session.SetSyncTimeout(5e8 * time.Nanosecond)
coll := session.DB("mydb").C("mycoll")
err = coll.Insert(M{"test": 1})
c.Assert(err, ErrorMatches, "no reachable servers")
// Writing to the local database is okay.
coll = session.DB("local").C("mycoll")
defer coll.RemoveAll(nil)
id := bson.NewObjectId()
err = coll.Insert(M{"_id": id})
c.Assert(err, IsNil)
// Data was stored in the right server.
n, err := coll.Find(M{"_id": id}).Count()
c.Assert(err, IsNil)
c.Assert(n, Equals, 1)
// Server hasn't changed.
result.Host = ""
err = session.Run("serverStatus", result)
c.Assert(err, IsNil)
c.Assert(strings.HasSuffix(result.Host, ":40012"), Equals, true)
}
func (s *S) TestConnectCloseConcurrency(c *C) {
restore := mgo.HackPingDelay(500 * time.Millisecond)
defer restore()
var wg sync.WaitGroup
const n = 500
wg.Add(n)
for i := 0; i < n; i++ {
go func() {
defer wg.Done()
session, err := mgo.Dial("localhost:40001")
if err != nil {
c.Fatal(err)
}
time.Sleep(1)
session.Close()
}()
}
wg.Wait()
}
func (s *S) TestPrimaryShutdownMonotonic(c *C) {
if *fast {
c.Skip("-fast")
}
session, err := mgo.Dial("localhost:40021")
c.Assert(err, IsNil)
defer session.Close()
session.SetMode(mgo.Monotonic, true)
// Insert something to force a switch to the master.
coll := session.DB("mydb").C("mycoll")
err = coll.Insert(M{"a": 1})
c.Assert(err, IsNil)
// Wait a bit for this to be synchronized to slaves.
time.Sleep(3 * time.Second)
result := &struct{ Host string }{}
err = session.Run("serverStatus", result)
c.Assert(err, IsNil)
// Kill the master.
host := result.Host
s.Stop(host)
// This must fail, since the connection was broken.
err = session.Run("serverStatus", result)
c.Assert(err, Equals, io.EOF)
// With monotonic consistency, it fails again until reset.
err = session.Run("serverStatus", result)
c.Assert(err, Equals, io.EOF)
session.Refresh()
// Now we should be able to talk to the new master.
err = session.Run("serverStatus", result)
c.Assert(err, IsNil)
c.Assert(result.Host, Not(Equals), host)
}
func (s *S) TestSetModeMonotonic(c *C) {
// Must necessarily connect to a slave, otherwise the
// master connection will be available first.
session, err := mgo.Dial("localhost:40012")
c.Assert(err, IsNil)
defer session.Close()
session.SetMode(mgo.Monotonic, false)
c.Assert(session.Mode(), Equals, mgo.Monotonic)
result := M{}
cmd := session.DB("admin").C("$cmd")
err = cmd.Find(M{"ismaster": 1}).One(&result)
c.Assert(err, IsNil)
c.Assert(result["ismaster"], Equals, false)
coll := session.DB("mydb").C("mycoll")
err = coll.Insert(M{"a": 1})
c.Assert(err, IsNil)
result = M{}
err = cmd.Find(M{"ismaster": 1}).One(&result)
c.Assert(err, IsNil)
c.Assert(result["ismaster"], Equals, true)
// Wait since the sync also uses sockets.
for len(session.LiveServers()) != 3 {
c.Log("Waiting for cluster sync to finish...")
time.Sleep(5e8)
}
stats := mgo.GetStats()
c.Assert(stats.MasterConns, Equals, 1)
c.Assert(stats.SlaveConns, Equals, 2)
c.Assert(stats.SocketsInUse, Equals, 2)
session.SetMode(mgo.Monotonic, true)
stats = mgo.GetStats()
c.Assert(stats.SocketsInUse, Equals, 0)
}
func (s *S) TestPrimaryShutdownStrong(c *C) {
if *fast {
c.Skip("-fast")
}
session, err := mgo.Dial("localhost:40021")
c.Assert(err, IsNil)
defer session.Close()
// With strong consistency, this will open a socket to the master.
result := &struct{ Host string }{}
err = session.Run("serverStatus", result)
c.Assert(err, IsNil)
// Kill the master.
host := result.Host
s.Stop(host)
// This must fail, since the connection was broken.
err = session.Run("serverStatus", result)
c.Assert(err, Equals, io.EOF)
// With strong consistency, it fails again until reset.
err = session.Run("serverStatus", result)
c.Assert(err, Equals, io.EOF)
session.Refresh()
// Now we should be able to talk to the new master.
// Increase the timeout since this may take quite a while.
session.SetSyncTimeout(3 * time.Minute)
err = session.Run("serverStatus", result)
c.Assert(err, IsNil)
c.Assert(result.Host, Not(Equals), host)
// Insert some data to confirm it's indeed a master.
err = session.DB("mydb").C("mycoll").Insert(M{"n": 42})
c.Assert(err, IsNil)
}
func (s *S) TestSetModeStrongAfterMonotonic(c *C) {
// Test that shifting from Monotonic to Strong while
// using a slave socket will keep the socket reserved
// until the master socket is necessary, so that no
// switch over occurs unless it's actually necessary.
// Must necessarily connect to a slave, otherwise the
// master connection will be available first.
session, err := mgo.Dial("localhost:40012")
c.Assert(err, IsNil)
defer session.Close()
session.SetMode(mgo.Monotonic, false)
// Ensure we're talking to a slave, and reserve the socket.
result := M{}
err = session.Run("ismaster", &result)
c.Assert(err, IsNil)
c.Assert(result["ismaster"], Equals, false)
// Switch to a Strong session.
session.SetMode(mgo.Strong, false)
// Wait since the sync also uses sockets.
for len(session.LiveServers()) != 3 {
c.Log("Waiting for cluster sync to finish...")
time.Sleep(5e8)
}
// Slave socket should still be reserved.
stats := mgo.GetStats()
c.Assert(stats.SocketsInUse, Equals, 1)
// But any operation will switch it to the master.
result = M{}
err = session.Run("ismaster", &result)
c.Assert(err, IsNil)
c.Assert(result["ismaster"], Equals, true)
}
func (s *S) TestSocketTimeout(c *C) {
if *fast {
c.Skip("-fast")
}
session, err := mgo.Dial("localhost:40001")
c.Assert(err, IsNil)
defer session.Close()
s.Freeze("localhost:40001")
timeout := 3 * time.Second
session.SetSocketTimeout(timeout)
started := time.Now()
// Do something.
result := struct{ Ok bool }{}
err = session.Run("getLastError", &result)
c.Assert(err, ErrorMatches, ".*: i/o timeout")
c.Assert(started.Before(time.Now().Add(-timeout)), Equals, true)
c.Assert(started.After(time.Now().Add(-timeout*2)), Equals, true)
}
// Connect to the master of a deployment with a single server,
// run an insert, and then ensure the insert worked and that a
// single connection was established.
func (s *S) TestTopologySyncWithSingleMaster(c *C) {
// Use hostname here rather than IP, to make things trickier.
session, err := mgo.Dial("localhost:40001")
c.Assert(err, IsNil)
defer session.Close()
coll := session.DB("mydb").C("mycoll")
err = coll.Insert(M{"a": 1, "b": 2})
c.Assert(err, IsNil)
// One connection used for discovery. Master socket recycled for
// insert. Socket is reserved after insert.
stats := mgo.GetStats()
c.Assert(stats.MasterConns, Equals, 1)
c.Assert(stats.SlaveConns, Equals, 0)
c.Assert(stats.SocketsInUse, Equals, 1)
// Refresh session and socket must be released.
session.Refresh()
stats = mgo.GetStats()
c.Assert(stats.SocketsInUse, Equals, 0)
}
func (s *S) TestGridFSRemoveId(c *C) {
session, err := mgo.Dial("localhost:40011")
c.Assert(err, IsNil)
defer session.Close()
db := session.DB("mydb")
gfs := db.GridFS("fs")
file, err := gfs.Create("myfile.txt")
c.Assert(err, IsNil)
file.Write([]byte{'1'})
file.Close()
file, err = gfs.Create("myfile.txt")
c.Assert(err, IsNil)
file.Write([]byte{'2'})
id := file.Id()
file.Close()
err = gfs.RemoveId(id)
c.Assert(err, IsNil)
file, err = gfs.Open("myfile.txt")
c.Assert(err, IsNil)
defer file.Close()
var b [1]byte
_, err = file.Read(b[:])
c.Assert(err, IsNil)
c.Assert(string(b[:]), Equals, "1")
n, err := db.C("fs.chunks").Find(M{"files_id": id}).Count()
c.Assert(err, IsNil)
c.Assert(n, Equals, 0)
}
func (s *S) TestSocketTimeoutOnInactiveSocket(c *C) {
if *fast {
c.Skip("-fast")
}
session, err := mgo.Dial("localhost:40001")
c.Assert(err, IsNil)
defer session.Close()
timeout := 2 * time.Second
session.SetSocketTimeout(timeout)
// Do something that relies on the timeout and works.
c.Assert(session.Ping(), IsNil)
// Freeze and wait for the timeout to go by.
s.Freeze("localhost:40001")
time.Sleep(timeout + 500*time.Millisecond)
s.Thaw("localhost:40001")
// Do something again. The timeout above should not have killed
// the socket as there was nothing to be done.
c.Assert(session.Ping(), IsNil)
}
func (s *S) TestPrimaryShutdownEventual(c *C) {
if *fast {
c.Skip("-fast")
}
session, err := mgo.Dial("localhost:40021")
c.Assert(err, IsNil)
defer session.Close()
result := &struct{ Host string }{}
err = session.Run("serverStatus", result)
c.Assert(err, IsNil)
master := result.Host
session.SetMode(mgo.Eventual, true)
// Should connect to the master when needed.
coll := session.DB("mydb").C("mycoll")
err = coll.Insert(M{"a": 1})
c.Assert(err, IsNil)
// Wait a bit for this to be synchronized to slaves.
time.Sleep(3 * time.Second)
// Kill the master.
s.Stop(master)
// Should still work, with the new master now.
coll = session.DB("mydb").C("mycoll")
err = coll.Insert(M{"a": 1})
c.Assert(err, IsNil)
err = session.Run("serverStatus", result)
c.Assert(err, IsNil)
c.Assert(result.Host, Not(Equals), master)
}
func (s *S) TestGridFSReadAll(c *C) {
session, err := mgo.Dial("localhost:40011")
c.Assert(err, IsNil)
defer session.Close()
db := session.DB("mydb")
gfs := db.GridFS("fs")
file, err := gfs.Create("")
c.Assert(err, IsNil)
id := file.Id()
file.SetChunkSize(5)
n, err := file.Write([]byte("abcdefghijklmnopqrstuv"))
c.Assert(err, IsNil)
c.Assert(n, Equals, 22)
err = file.Close()
c.Assert(err, IsNil)
file, err = gfs.OpenId(id)
c.Assert(err, IsNil)
b := make([]byte, 30)
n, err = file.Read(b)
c.Assert(n, Equals, 22)
c.Assert(err, IsNil)
n, err = file.Read(b)
c.Assert(n, Equals, 0)
c.Assert(err == io.EOF, Equals, true)
err = file.Close()
c.Assert(err, IsNil)
}
