com.netflix.concurrency.limits.strategy

Class PredicatePartitionStrategy<T>

java.lang.Object

com.netflix.concurrency.limits.strategy.PredicatePartitionStrategy<T>

All Implemented Interfaces:

Strategy<T>

public final class PredicatePartitionStrategy<T>
extends java.lang.Object
implements Strategy<T>

Concurrency limiter that guarantees a certain percentage of the limit to specific callers while allowing callers to borrow from underutilized callers. Callers are identified by their index into an array of percentages passed in during initialization. A percentage of 0.0 means that a caller may only use excess capacity and can be completely starved when the limit is reached. A percentage of 1.0 means that the caller is guaranteed to get the entire limit. grpc.server.call.inflight (group=[a, b, c]) grpc.server.call.limit (group=[a,b,c])

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	PredicatePartitionStrategy.Builder<T>

Nested classes/interfaces inherited from interface com.netflix.concurrency.limits.Strategy

Strategy.Token

Method Summary

Modifier and Type	Method and Description
int	getBusyCount()
int	getLimit()
static <T> PredicatePartitionStrategy.Builder<T>	newBuilder()
void	setLimit(int newLimit) Update the strategy with a new limit
java.lang.String	toString()
java.util.Optional<Strategy.Token>	tryAcquire(T type) Try to acquire a token from the limiter.

Methods inherited from class java.lang.Object

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

Method Detail

newBuilder

public static <T> PredicatePartitionStrategy.Builder<T> newBuilder()

tryAcquire

public java.util.Optional<Strategy.Token> tryAcquire(T type)

Description copied from interface: Strategy

Try to acquire a token from the limiter.

Specified by:

tryAcquire in interface Strategy<T>

Parameters:

type - Context of the request for partitioned limits

Returns:

Optional.empty() if limit exceeded or a Strategy.Token that must be released when the operation completes.

setLimit

public void setLimit(int newLimit)

Description copied from interface: Strategy

Update the strategy with a new limit

Specified by:

setLimit in interface Strategy<T>

getLimit

public int getLimit()

getBusyCount

public int getBusyCount()

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object