io.greptime.rpc.interceptors

Class ClientRequestLimitInterceptor

java.lang.Object

io.greptime.rpc.interceptors.ClientRequestLimitInterceptor

All Implemented Interfaces:

io.grpc.ClientInterceptor

public class ClientRequestLimitInterceptor
extends Object
implements io.grpc.ClientInterceptor

ClientInterceptor that enforces per service and/or per method concurrent request limits and returns a Status.UNAVAILABLE when that limit has been reached.

Refer to `concurrency-limit-grpc`

Author:

jiachun.fjc

Constructor Summary

Constructors

Constructor and Description
ClientRequestLimitInterceptor(com.netflix.concurrency.limits.Limiter<RequestLimitCtx> limiter)
ClientRequestLimitInterceptor(com.netflix.concurrency.limits.Limiter<RequestLimitCtx> limiter, java.util.function.Function<String,Boolean> filter)

Method Summary

Modifier and Type	Method and Description
<ReqT,RespT> io.grpc.ClientCall<ReqT,RespT>	interceptCall(io.grpc.MethodDescriptor<ReqT,RespT> method, io.grpc.CallOptions callOpts, io.grpc.Channel next)
static boolean	isLimitSwitchOpen() Whether limit open.
static boolean	resetLimitSwitch() See isLimitSwitchOpen() Reset `limitSwitch`, set to the opposite of the old value.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ClientRequestLimitInterceptor

public ClientRequestLimitInterceptor(com.netflix.concurrency.limits.Limiter<RequestLimitCtx> limiter)

ClientRequestLimitInterceptor

public ClientRequestLimitInterceptor(com.netflix.concurrency.limits.Limiter<RequestLimitCtx> limiter,
                                     java.util.function.Function<String,Boolean> filter)

Method Detail

interceptCall

public <ReqT,RespT> io.grpc.ClientCall<ReqT,RespT> interceptCall(io.grpc.MethodDescriptor<ReqT,RespT> method,
                                                                 io.grpc.CallOptions callOpts,
                                                                 io.grpc.Channel next)

Specified by:

interceptCall in interface io.grpc.ClientInterceptor

isLimitSwitchOpen

public static boolean isLimitSwitchOpen()

Whether limit open.

Returns:

true or false

resetLimitSwitch

public static boolean resetLimitSwitch()

See isLimitSwitchOpen() Reset `limitSwitch`, set to the opposite of the old value.

Returns:

old value