Interface ApiCallContext (2.32.1)

Context for an API call.

An API call can be composed of many RPCs (in case of retries). This class contains settings for both: API calls and RPCs.

Implementations need to be immutable because default instances are stored in callable objects.

This is transport specific and each transport has an implementation with its own options.

Return the api call context option set for this context.

Return a new ApiCallContext with additional option merged into the present instance. Any existing value of the key is overwritten.

Return the extra headers set for this context.

The stream idle timeout set for this context. See Also: #withStreamIdleTimeout(Duration)

Return the stream wait timeout set for this context. See Also: #withStreamWaitTimeout(Duration)

Returns the configured per-RPC timeout.

The ApiTracer that was previously set for this context.

The ApiTracer will be used to trace the current operation and to annotate various events like retries.

For any values in inputCallContext that are not null, override the corresponding values in the present instance.

If inputContext is not null, returns it; if it is null, returns the present instance.

Returns a new ApiCallContext with the given credentials set.

Return a new ApiCallContext with the extraHeaders merged into the present instance.

Returns a new ApiCallContext with the given RetrySettings set.

This sets the RetrySettings to use for the RPC. These settings will work in combination with either the default retryable codes for the RPC, or the retryable codes supplied through #withRetryableCodes(Set). Calling #withRetrySettings(RetrySettings) on an RPC that does not include Code#DEADLINE_EXCEEDED as one of its retryable codes (or without calling #withRetryableCodes(Set) with a set that includes at least Code#DEADLINE_EXCEEDED) will effectively only set a single timeout that is equal to RetrySettings#getInitialRpcTimeout(). If this timeout is exceeded, the RPC will not be retried and will fail with Code#DEADLINE_EXCEEDED.

Example usage:

 ApiCallContext context = GrpcCallContext.createDefault()
   .withRetrySettings(RetrySettings.newBuilder()
     .setInitialRetryDelay(Duration.ofMillis(10L))
     .setInitialRpcTimeout(Duration.ofMillis(100L))
     .setMaxAttempts(10)
     .setMaxRetryDelay(Duration.ofSeconds(10L))
     .setMaxRpcTimeout(Duration.ofSeconds(30L))
     .setRetryDelayMultiplier(1.4)
     .setRpcTimeoutMultiplier(1.5)
     .setTotalTimeout(Duration.ofMinutes(10L))
     .build())
   .withRetryableCodes(Sets.newSet(
     StatusCode.Code.UNAVAILABLE,
     StatusCode.Code.DEADLINE_EXCEEDED));
 

Setting a logical call timeout for the context can be done similarly with RetrySettings.Builder#setLogicalTimeout(Duration timeout).

Example usage:

 ApiCallContext context = GrpcCallContext.createDefault()
   .withRetrySettings(RetrySettings.newBuilder()
     .setInitialRetryDelay(Duration.ofMillis(10L))
     .setMaxRetryDelay(Duration.ofSeconds(10L))
     .setRetryDelayMultiplier(1.4)
     .setMaxAttempts(10)
     .setLogicalTimeout(Duration.ofSeconds(30L))
     .build());
 

Returns a new ApiCallContext with the given retryable codes set.

This sets the retryable codes to use for the RPC. These settings will work in combination with either the default RetrySettings for the RPC, or the RetrySettings supplied through #withRetrySettings(RetrySettings).

Setting a non-empty set of retryable codes for an RPC that is not already retryable by default, will not have any effect and the RPC will NOT be retried. This option can only be used to change which codes are considered retryable for an RPC that already has at least one retryable code in its default settings.

Returns a new ApiCallContext with the given stream idle timeout set.

This timeout only applies to a ServerStreamingCallables. It limits the maximum amount of timeout that can pass between a message being received by ResponseObserver#onResponse(Object) and demand being signaled via StreamController#request(int). Please note that this timeout is best effort and the maximum resolution configured in StubSettings#getStreamWatchdogCheckInterval(). This is useful to clean up streams that were partially read but never closed. When the timeout has been reached, the stream will be closed with a nonretryable WatchdogTimeoutException and a status of StatusCode.Code#ABORTED.

A value of Duration#ZERO, disables the streaming idle timeout and a null value will use the default in the callable.

Please note that this timeout is best effort and the maximum resolution is configured in StubSettings#getStreamWatchdogCheckInterval().

Returns a new ApiCallContext with the given stream timeout set.

This timeout only applies to a ServerStreamingCallables. It limits the maximum amount of time that can pass between demand being signaled via StreamController#request(int) and actual message delivery to ResponseObserver#onResponse(Object). Or, in the case of automatic flow control, since the last message was delivered to ResponseObserver#onResponse(Object). This is useful to detect server or connection stalls. When the timeout has been reached, the stream will be closed with a retryable WatchdogTimeoutException and a status of StatusCode.Code#ABORTED.

A value of Duration#ZERO, disables the streaming wait timeout and a null value will use the default in the callable.

Please note that this timeout is best effort and the maximum resolution is configured in StubSettings#getStreamWatchdogCheckInterval().

Returns a new ApiCallContext with the given timeout set.

This sets the maximum amount of time a single unary RPC attempt can take. If retries are enabled, then this can take much longer, as each RPC attempt will have the same constant timeout. Unlike a deadline, timeouts are relative durations that are measure from the beginning of each RPC attempt. Please note that this limits the duration of a server streaming RPC as well.

If a method has default com.google.api.gax.retrying.RetrySettings, the max attempts and/or total timeout is still respected when scheduling each RPC attempt.

Returns a new ApiCallContext with the given ApiTracer.

The ApiTracer will be used to trace the current operation and to annotate various events like retries.

Returns a new ApiCallContext with the given channel set.