func withContext(logger seelog.LoggerInterface, context ...string) (contextLogger T) {
formatFilter := &ContextFormatFilter{Context: context}
contextLogger = &Wrapper{Delegate: logger, Format: formatFilter, M: pkgMutex}
// additional stack depth so that we print the calling function correctly
// stack depth 0 would print the function in the seelog logger (e.g. seelog.Debug)
// stack depth 1 would print the function in the wrapper (e.g. wrapper.Debug)
// stack depth 2 prints the function calling the logger (wrapper), which is what we want.
logger.SetAdditionalStackDepth(2)
return contextLogger
}
func init() {
var seelogger seelog.LoggerInterface
var err error
fmt.Fprintln(os.Stderr, "Use default config init Logger")
seelogger, err = seelog.LoggerFromConfigAsBytes([]byte(defaultConfig))
if err != nil {
log.Panicf("Can't init Logger,error:%s", err)
return
} else {
//确保取得正确的调用堆栈
seelogger.SetAdditionalStackDepth(2)
}
logger = &SeeLogLogger{seelogger}
}
func (self *LogStack) Flush() {
self.Lock()
defer self.Unlock()
var log seelog.LoggerInterface
if self.LoggerInterface != nil {
log = self.LoggerInterface
}
if self.loggerGetter != nil {
log = self.loggerGetter.GetLogger()
}
for len(self.s) > 0 {
message := self.s[0]
switch message.level {
case seelog.TraceLvl:
log.Trace(message.text)
case seelog.DebugLvl:
log.Debug(message.text)
case seelog.InfoLvl:
log.Info(message.text)
case seelog.WarnLvl:
log.Warn(message.text)
case seelog.ErrorLvl:
log.Error(message.text)
case seelog.CriticalLvl:
log.Critical(message.text)
}
self.s = self.s[1:len(self.s)]
}
log.Flush()
}
func setupV2cClientTest(logger seelog.LoggerInterface, testIdGenerator chan string) {
Describe("V2cClient", func() {
var (
clientCtxt *snmp.ClientContext
numClients int
clients []*snmp.V2cClient
err error
)
BeforeEach(func() {
testId := <-testIdGenerator
clientCtxt = snmp.NewClientContext(testId, 1000, logger)
clientCtxt.SetDecodeErrorLogging(true)
numClients = 1
})
JustBeforeEach(func() {
clients = make([]*snmp.V2cClient, numClients)
for i := 0; i < numClients; i++ {
clients[i], err = clientCtxt.NewV2cClientWithPort("private", "localhost", 2000)
}
})
AfterEach(func() {
clientCtxt.Shutdown()
})
Describe("creating a client", func() {
var errClient *snmp.V2cClient
Context("using valid parameters", func() {
It("should create a correctly configured client", func() {
Ω(clients[0]).ShouldNot(BeNil())
Ω(err).Should(BeNil())
Ω(clients[0].Community).Should(Equal("private"))
Ω(clients[0].Address.String()).Should(Equal("127.0.0.1:" + strconv.Itoa(2000)))
})
})
Context("using an invalid", func() {
ValidateClientCreationFailure := func(errorMsg string) {
It("should generate an error with appropriate error text", func() {
Ω(errClient).Should(BeNil())
Ω(err).ShouldNot(BeNil())
Ω(err.Error()).Should(Equal(errorMsg))
})
}
BeforeEach(func() {
numClients = 0
})
Context("address", func() {
BeforeEach(func() {
errClient, err = clientCtxt.NewV2cClientWithPort("private", "blahblah", 2000)
})
ValidateClientCreationFailure("lookup blahblah: no such host")
})
Context("port (out of range low)", func() {
BeforeEach(func() {
errClient, err = clientCtxt.NewV2cClientWithPort("private", "localhost", 0)
})
ValidateClientCreationFailure("invalid port: 0")
})
Context("port (extremly out of range low)", func() {
BeforeEach(func() {
errClient, err = clientCtxt.NewV2cClientWithPort("private", "localhost", math.MinInt64)
})
ValidateClientCreationFailure(fmt.Sprintf("invalid port: %d", math.MinInt64))
})
Context("port (out of range high)", func() {
BeforeEach(func() {
errClient, err = clientCtxt.NewV2cClientWithPort("private", "localhost", 65536)
})
ValidateClientCreationFailure("invalid port: 65536")
})
Context("port (extremely out of range high)", func() {
BeforeEach(func() {
errClient, err = clientCtxt.NewV2cClientWithPort("private", "localhost", math.MaxInt64)
})
ValidateClientCreationFailure(fmt.Sprintf("invalid port: %d", math.MaxInt64))
})
})
})
Describe("creating a request", func() {
var req snmp.CommunityRequest
ValidateRequest := func() {
It("should be possible", func() {
Ω(req).ShouldNot(BeNil())
Ω(req.GetError()).Should(BeNil())
Ω(req.GetResponse()).Should(BeNil())
})
}
AfterEach(func() {
clientCtxt.FreeV2cRequest(req)
})
Context("as a GET request", func() {
Context("with no OIDS", func() {
BeforeEach(func() {
req = clientCtxt.AllocateV2cGetRequest()
})
ValidateRequest()
})
Context("with a predefined set of OIDS", func() {
BeforeEach(func() {
oids := []snmp.ObjectIdentifier{snmp.SYS_OBJECT_ID_OID, snmp.SYS_NAME_OID, snmp.SYS_LOCATION_OID, snmp.SYS_DESCR_OID, snmp.SYS_CONTACT_OID, snmp.SYS_UPTIME_OID}
req = clientCtxt.AllocateV2cGetRequestWithOids(oids)
})
ValidateRequest()
})
})
Context("as a SET request", func() {
BeforeEach(func() {
req = clientCtxt.AllocateV2cSetRequest()
})
ValidateRequest()
})
Context("as a GETNEXT request", func() {
BeforeEach(func() {
req = clientCtxt.AllocateV2cGetNextRequest()
})
ValidateRequest()
})
})
Describe("sending a request to a non-existent agent", func() {
ValidateRequestTimeout := func(retries int, timeoutSeconds int) {
It("should timeout after the appropriate amount of time", func(done Done) {
var waitGroup sync.WaitGroup
waitGroup.Add(numClients)
start := time.Now()
for i := 0; i < numClients; i++ {
clients[i].Retries = retries
clients[i].TimeoutSeconds = timeoutSeconds
go func(client *snmp.V2cClient) {
req := clientCtxt.AllocateV2cGetRequest()
client.SendRequest(req)
err := req.GetError()
Ω(err).ShouldNot(BeNil())
_, ok := err.(snmp.TimeoutError)
Ω(ok).Should(BeTrue())
waitGroup.Done()
clientCtxt.FreeV2cRequest(req)
}(clients[i])
}
waitGroup.Wait()
Ω(time.Since(start).Seconds()).Should(BeNumerically("<", float64(timeoutSeconds*(retries+1))+0.2))
requestCount := numClients
msgCount := requestCount * (retries + 1)
validateStats(clientCtxt, map[snmp.StatType]int{
snmp.StatType_REQUESTS_SENT: requestCount,
snmp.StatType_REQUEST_RETRIES_EXHAUSTED: requestCount,
snmp.StatType_REQUESTS_TIMED_OUT: requestCount * retries,
snmp.StatType_REQUESTS_FORWARDED_TO_FLOW_CONTROL: msgCount,
snmp.StatType_OUTBOUND_MESSAGES_SENT: msgCount,
})
close(done)
}, float64(timeoutSeconds*(retries+1))+2)
}
Context("from a single client", func() {
Context("using 0 retries and a timeout of 1 second", func() {
ValidateRequestTimeout(0, 1)
})
Context("using 1 retry and a timeout of 2 seconds", func() {
ValidateRequestTimeout(1, 2)
})
Context("using 2 retries and a timeout of 1 second", func() {
ValidateRequestTimeout(2, 1)
})
})
Context("from multiple clients", func() {
BeforeEach(func() {
numClients = 50
})
Context("using 0 retries and a timeout of 1 second", func() {
ValidateRequestTimeout(0, 1)
})
Context("using 1 retry and a timeout of 2 seconds", func() {
ValidateRequestTimeout(1, 2)
})
Context("using 2 retries and a timeout of 1 second", func() {
ValidateRequestTimeout(2, 1)
})
})
})
Describe("sending multiple requests to a non-existent agent", func() {
ValidateRequestTimeout := func(retries int, timeoutSeconds int, numRequests int) {
It("should timeout after the appropriate amount of time", func(done Done) {
var waitGroup sync.WaitGroup
waitGroup.Add(numRequests * numClients)
start := time.Now()
for i := 0; i < numClients; i++ {
clients[i].Retries = retries
clients[i].TimeoutSeconds = timeoutSeconds
go func(client *snmp.V2cClient) {
for j := 0; j < numRequests; j++ {
req := clientCtxt.AllocateV2cGetRequest()
client.SendRequest(req)
err := req.GetError()
Ω(err).ShouldNot(BeNil())
_, ok := err.(snmp.TimeoutError)
Ω(ok).Should(BeTrue())
waitGroup.Done()
clientCtxt.FreeV2cRequest(req)
}
}(clients[i])
}
waitGroup.Wait()
Ω(time.Since(start).Seconds()).Should(BeNumerically("<", float64(timeoutSeconds*(retries+1)*numRequests)+0.2))
requestCount := numClients * numRequests
msgCount := requestCount * (retries + 1)
validateStats(clientCtxt, map[snmp.StatType]int{
snmp.StatType_REQUESTS_SENT: requestCount,
snmp.StatType_REQUEST_RETRIES_EXHAUSTED: requestCount,
snmp.StatType_REQUESTS_TIMED_OUT: requestCount * retries,
snmp.StatType_REQUESTS_FORWARDED_TO_FLOW_CONTROL: msgCount,
snmp.StatType_OUTBOUND_MESSAGES_SENT: msgCount,
})
close(done)
}, float64(timeoutSeconds*(retries+1)*numRequests)+2)
}
Context("from a single client", func() {
Context("using 0 retries and a timeout of 1 second", func() {
ValidateRequestTimeout(0, 1, 3)
})
Context("using 1 retries and a timeout of 2 seconds", func() {
ValidateRequestTimeout(1, 2, 3)
})
Context("using 2 retries and a timeout of 1 second", func() {
ValidateRequestTimeout(2, 1, 3)
})
})
Context("from multiple clients", func() {
BeforeEach(func() {
numClients = 50
})
Context("using 0 retries and a timeout of 1 second", func() {
ValidateRequestTimeout(0, 1, 3)
})
Context("using 1 retries and a timeout of 2 seconds", func() {
ValidateRequestTimeout(1, 2, 3)
})
Context("using 2 retries and a timeout of 1 second", func() {
ValidateRequestTimeout(2, 1, 3)
})
})
})
Describe("sending a request to an active agent", func() {
var (
agent *snmp.Agent
)
BeforeEach(func() {
agent = snmp.NewAgentWithPort("testAgent", 10, 2000, logger, new(fakeTransactionProvider))
agent.RegisterSingleVarOidHandler(snmp.SYS_OBJECT_ID_OID, snmp.NewObjectIdentifierOidHandler(snmp.ObjectIdentifier{1, 3, 6, 1, 4, 1, 424242, 1, 1}, false))
agent.RegisterSingleVarOidHandler(snmp.SYS_DESCR_OID, snmp.NewStringOidHandler("Test System Description", false))
agent.SetDecodeErrorLogging(true)
})
AfterEach(func() {
agent.Shutdown()
})
ValidateResponse := func(retries int, timeoutSeconds int) {
It("should return a valid response", func(done Done) {
var waitGroup sync.WaitGroup
waitGroup.Add(numClients)
start := time.Now()
for i := 0; i < numClients; i++ {
clients[i].Retries = retries
clients[i].TimeoutSeconds = timeoutSeconds
go func(client *snmp.V2cClient) {
req := clientCtxt.AllocateV2cGetRequestWithOids([]snmp.ObjectIdentifier{snmp.SYS_OBJECT_ID_OID, snmp.SYS_DESCR_OID})
client.SendRequest(req)
err := req.GetError()
Ω(err).Should(BeNil())
resp := req.GetResponse()
Ω(resp).ShouldNot(BeNil())
logger.Debugf("Response %s", spew.Sdump(resp))
clientCtxt.FreeV2cRequest(req)
waitGroup.Done()
}(clients[i])
}
waitGroup.Wait()
Ω(time.Since(start).Seconds()).Should(BeNumerically("<", float64(0.2)))
// Check Client stats
validateStats(clientCtxt, map[snmp.StatType]int{
snmp.StatType_RESPONSES_RECEIVED: numClients,
snmp.StatType_REQUESTS_SENT: numClients,
snmp.StatType_REQUESTS_FORWARDED_TO_FLOW_CONTROL: numClients,
snmp.StatType_OUTBOUND_MESSAGES_SENT: numClients,
snmp.StatType_INBOUND_MESSAGES_RECEIVED: numClients,
snmp.StatType_RESPONSES_RELEASED_TO_CLIENT: numClients,
})
// Check Agent stats
validateStats(agent, map[snmp.StatType]int{
snmp.StatType_INBOUND_MESSAGES_RECEIVED: numClients,
snmp.StatType_GET_REQUESTS_RECEIVED: numClients,
snmp.StatType_OUTBOUND_MESSAGES_SENT: numClients,
})
close(done)
}, 2)
}
Context("from a single client", func() {
Context("using 0 retries and a timeout of 1 second", func() {
ValidateResponse(0, 1)
})
Context("using 1 retry and a timeout of 2 seconds", func() {
ValidateResponse(1, 2)
})
Context("using 2 retries and a timeout of 1 second", func() {
ValidateResponse(2, 1)
})
})
Context("from multiple clients", func() {
BeforeEach(func() {
numClients = 50
})
Context("using 0 retries and a timeout of 1 second", func() {
ValidateResponse(0, 1)
})
Context("using 1 retry and a timeout of 2 seconds", func() {
ValidateResponse(1, 2)
})
Context("using 2 retries and a timeout of 1 second", func() {
ValidateResponse(2, 1)
})
})
})
})
}
