nl.topicus.jdbc.shaded.com.google.api.gax.batching.FlowControlSettings Maven / Gradle / Ivy
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* Copyright 2016, Google LLC All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google LLC nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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package nl.topicus.jdbc.shaded.com.google.api.gax.batching;
import nl.topicus.jdbc.shaded.com.google.api.core.BetaApi;
import nl.topicus.jdbc.shaded.com.google.api.gax.batching.FlowController.FlowControlException;
import nl.topicus.jdbc.shaded.com.google.api.gax.batching.FlowController.LimitExceededBehavior;
import nl.topicus.jdbc.shaded.com.google.auto.value.AutoValue;
import nl.topicus.jdbc.shaded.com.google.common.base.Preconditions;
import nl.topicus.jdbc.shaded.javax.annotation.Nullable;
/** Settings for {@link FlowController}. */
@BetaApi("The surface for batching is not stable yet and may change in the future.")
@AutoValue
public abstract class FlowControlSettings {
public static FlowControlSettings getDefaultInstance() {
return FlowControlSettings.newBuilder().build();
}
/** Maximum number of outstanding elements to keep in memory before enforcing flow control. */
@Nullable
public abstract Long getMaxOutstandingElementCount();
/** Maximum number of outstanding bytes to keep in memory before enforcing flow control. */
@Nullable
public abstract Long getMaxOutstandingRequestBytes();
/**
* The behavior of {@link FlowController} when the specified limits are exceeded. Defaults to
* Block.
*
* The expected behavior for each of these values is:
*
*
* - ThrowException: the FlowController will throw a {@link FlowControlException} if any of
* the limits are exceeded.
*
- Block: the reserve() method of FlowController will block until the quote is available to
* be reserved.
*
- Ignore: all flow control limits will be ignored; the FlowController is disabled.
*
*/
public abstract LimitExceededBehavior getLimitExceededBehavior();
public Builder toBuilder() {
return new AutoValue_FlowControlSettings.Builder(this);
}
public static Builder newBuilder() {
return new AutoValue_FlowControlSettings.Builder()
.setLimitExceededBehavior(LimitExceededBehavior.Block);
}
@BetaApi
@AutoValue.Builder
public abstract static class Builder {
public abstract Builder setMaxOutstandingElementCount(Long value);
public abstract Builder setMaxOutstandingRequestBytes(Long value);
public abstract Builder setLimitExceededBehavior(LimitExceededBehavior value);
abstract FlowControlSettings autoBuild();
public FlowControlSettings build() {
FlowControlSettings settings = autoBuild();
Preconditions.checkArgument(
settings.getMaxOutstandingElementCount() == null
|| settings.getMaxOutstandingElementCount() > 0,
"maxOutstandingElementCount limit is disabled by default, but if set it must be set to a value greater than 0.");
Preconditions.checkArgument(
settings.getMaxOutstandingRequestBytes() == null
|| settings.getMaxOutstandingRequestBytes() > 0,
"maxOutstandingRequestBytes limit is disabled by default, but if set it must be set to a value greater than 0.");
return settings;
}
}
}