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/*
* Copyright 2015, Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
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*
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*
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*
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package org.glowroot.agent.shaded.grpc;
import org.glowroot.agent.shaded.google.common.base.MoreObjects;
import java.util.concurrent.Executor;
import java.util.concurrent.TimeUnit;
import javax.annotation.Nullable;
import javax.annotation.concurrent.Immutable;
/**
* The collection of runtime options for a new RPC call.
*
* A field that is not set is {@code null}.
*/
@Immutable
public final class CallOptions {
/**
* A blank {@code CallOptions} that all fields are not set.
*/
public static final CallOptions DEFAULT = new CallOptions();
// Although {@code CallOptions} is immutable, its fields are not final, so that we can initialize
// them outside of constructor. Otherwise the constructor will have a potentially long list of
// unnamed arguments, which is undesirable.
private Long deadlineNanoTime;
private Executor executor;
@Nullable
private String authority;
@Nullable
private RequestKey requestKey;
@Nullable
private String compressorName;
/**
* Override the HTTP/2 authority the channel claims to be connecting to. This is not
* generally safe. Overriding allows advanced users to re-use a single Channel for multiple
* services, even if those services are hosted on different domain names. That assumes the
* server is virtually hosting multiple domains and is guaranteed to continue doing so. It is
* rare for a service provider to make such a guarantee. At this time, there is no security
* verification of the overridden value, such as making sure the authority matches the server's
* TLS certificate.
*/
@ExperimentalApi("https://github.com/grpc/grpc-java/issues/67")
public CallOptions withAuthority(@Nullable String authority) {
CallOptions newOptions = new CallOptions(this);
newOptions.authority = authority;
return newOptions;
}
/**
* Sets the compression to use for the call. The compressor must be a valid name known in the
* {@link CompressorRegistry}.
*/
@ExperimentalApi
public CallOptions withCompression(@Nullable String compressorName) {
CallOptions newOptions = new CallOptions(this);
newOptions.compressorName = compressorName;
return newOptions;
}
/**
* Returns a new {@code CallOptions} with the given absolute deadline in nanoseconds in the clock
* as per {@link System#nanoTime()}.
*
*
This is mostly used for propagating an existing deadline. {@link #withDeadlineAfter} is the
* recommended way of setting a new deadline,
*
* @param deadlineNanoTime the deadline in the clock as per {@link System#nanoTime()}.
* {@code null} for unsetting the deadline.
*/
public CallOptions withDeadlineNanoTime(@Nullable Long deadlineNanoTime) {
CallOptions newOptions = new CallOptions(this);
newOptions.deadlineNanoTime = deadlineNanoTime;
return newOptions;
}
/**
* Returns a new {@code CallOptions} with a deadline that is after the given {@code duration} from
* now.
*/
public CallOptions withDeadlineAfter(long duration, TimeUnit unit) {
return withDeadlineNanoTime(System.nanoTime() + unit.toNanos(duration));
}
/**
* Returns the deadline in nanoseconds in the clock as per {@link System#nanoTime()}. {@code null}
* if the deadline is not set.
*/
@Nullable
public Long getDeadlineNanoTime() {
return deadlineNanoTime;
}
/**
* Returns a new {@code CallOptions} with a request key for affinity-based routing.
*/
@ExperimentalApi
public CallOptions withRequestKey(@Nullable RequestKey requestKey) {
CallOptions newOptions = new CallOptions(this);
newOptions.requestKey = requestKey;
return newOptions;
}
/**
* Returns the request key for affinity-based routing.
*/
@ExperimentalApi
@Nullable
public RequestKey getRequestKey() {
return requestKey;
}
/**
* Returns the compressor's name.
*/
@ExperimentalApi
@Nullable
public String getCompressor() {
return compressorName;
}
/**
* Override the HTTP/2 authority the channel claims to be connecting to. This is not
* generally safe. Overriding allows advanced users to re-use a single Channel for multiple
* services, even if those services are hosted on different domain names. That assumes the
* server is virtually hosting multiple domains and is guaranteed to continue doing so. It is
* rare for a service provider to make such a guarantee. At this time, there is no security
* verification of the overridden value, such as making sure the authority matches the server's
* TLS certificate.
*/
@Nullable
@ExperimentalApi("https://github.com/grpc/grpc-java/issues/67")
public String getAuthority() {
return authority;
}
/**
* Returns a new {@code CallOptions} with {@code executor} to be used instead of the default
* executor specified with {@link ManagedChannelBuilder#executor}.
*/
public CallOptions withExecutor(Executor executor) {
CallOptions newOptions = new CallOptions(this);
newOptions.executor = executor;
return newOptions;
}
@Nullable
public Executor getExecutor() {
return executor;
}
private CallOptions() {
}
/**
* Copy constructor.
*/
private CallOptions(CallOptions other) {
deadlineNanoTime = other.deadlineNanoTime;
authority = other.authority;
requestKey = other.requestKey;
executor = other.executor;
compressorName = other.compressorName;
}
@Override
public String toString() {
MoreObjects.ToStringHelper toStringHelper = MoreObjects.toStringHelper(this);
toStringHelper.add("deadlineNanoTime", deadlineNanoTime);
if (deadlineNanoTime != null) {
long remainingNanos = deadlineNanoTime - System.nanoTime();
toStringHelper.addValue(remainingNanos + " ns from now");
}
toStringHelper.add("authority", authority);
return toStringHelper.toString();
}
}