#244

Committed 10 Apr 2024 08:19PM UTC coverage: 77.465% (-0.08%) from 77.549%

Build # #244

Build Type

push

github

Committed by

web-flow

Commit Message

Slot supplier interface & fixed-size implementation (#2014)

https://github.com/temporalio/proposals/blob/master/all-sdk/autotuning.md

Run Details

286 of 388 new or added lines in 25 files covered. (73.71%)

3 existing lines in 3 files now uncovered.

19116 of 24677 relevant lines covered (77.46%)

0.77 hits per line

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93.75

/temporal-sdk/src/main/java/io/temporal/worker/tuning/FixedSizeSlotSupplier.java

/*
 * Copyright (C) 2022 Temporal Technologies, Inc. All Rights Reserved.
 *
 * Copyright (C) 2012-2016 Amazon.com, Inc. or its affiliates. All Rights Reserved.
 *
 * Modifications copyright (C) 2017 Uber Technologies, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this material except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package io.temporal.worker.tuning;

import com.google.common.base.Preconditions;
import java.util.Optional;
import java.util.concurrent.*;

/**
 * This implementation of {@link SlotSupplier} provides a fixed number of slots backed by a
 * semaphore, and is the default behavior when a custom supplier is not explicitly specified.
 *
 * @param <SI> The slot info type for this supplier.
 */
public class FixedSizeSlotSupplier<SI extends SlotInfo> implements SlotSupplier<SI> {
  private final int numSlots;
  private final Semaphore executorSlotsSemaphore;

  public FixedSizeSlotSupplier(int numSlots) {
    Preconditions.checkArgument(numSlots > 0, "FixedSizeSlotSupplier must have at least one slot");
    this.numSlots = numSlots;
    executorSlotsSemaphore = new Semaphore(numSlots);
  }

  @Override
  public SlotPermit reserveSlot(SlotReserveContext<SI> ctx) throws InterruptedException {
    executorSlotsSemaphore.acquire();
    return new SlotPermit();
  }

  @Override
  public Optional<SlotPermit> tryReserveSlot(SlotReserveContext<SI> ctx) {
    boolean gotOne = executorSlotsSemaphore.tryAcquire();
    if (gotOne) {
      return Optional.of(new SlotPermit());
    }
    return Optional.empty();
  }

  @Override
  public void markSlotUsed(SlotMarkUsedContext<SI> ctx) {}

  @Override
  public void releaseSlot(SlotReleaseContext<SI> ctx) {
    executorSlotsSemaphore.release();
  }

  @Override
  public int getMaximumSlots() {
    return numSlots;
  }

  @Override
  public String toString() {
    return "FixedSizeSlotSupplier{" + "numSlots=" + numSlots + '}';
  }
}

1	/*
2	* Copyright (C) 2022 Temporal Technologies, Inc. All Rights Reserved.
3	*
4	* Copyright (C) 2012-2016 Amazon.com, Inc. or its affiliates. All Rights Reserved.
5	*
6	* Modifications copyright (C) 2017 Uber Technologies, Inc.
7	*
8	* Licensed under the Apache License, Version 2.0 (the "License");
9	* you may not use this material except in compliance with the License.
10	* You may obtain a copy of the License at
11	*
12	* http://www.apache.org/licenses/LICENSE-2.0
13	*
14	* Unless required by applicable law or agreed to in writing, software
15	* distributed under the License is distributed on an "AS IS" BASIS,
16	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
17	* See the License for the specific language governing permissions and
18	* limitations under the License.
19	*/
20
21	package io.temporal.worker.tuning;
22
23	import com.google.common.base.Preconditions;
24	import java.util.Optional;
25	import java.util.concurrent.*;
26
27	/**
28	* This implementation of {@link SlotSupplier} provides a fixed number of slots backed by a
29	* semaphore, and is the default behavior when a custom supplier is not explicitly specified.
30	*
31	* @param <SI> The slot info type for this supplier.
32	*/
33	public class FixedSizeSlotSupplier<SI extends SlotInfo> implements SlotSupplier<SI> {
34	private final int numSlots;
35	private final Semaphore executorSlotsSemaphore;
36
37	public FixedSizeSlotSupplier(int numSlots) {	1✔
38	Preconditions.checkArgument(numSlots > 0, "FixedSizeSlotSupplier must have at least one slot");	1✔
39	this.numSlots = numSlots;	1✔
40	executorSlotsSemaphore = new Semaphore(numSlots);	1✔
41	}	1✔
42
43	@Override
44	public SlotPermit reserveSlot(SlotReserveContext<SI> ctx) throws InterruptedException {
45	executorSlotsSemaphore.acquire();	1✔
46	return new SlotPermit();	1✔
47	}
48
49	@Override
50	public Optional<SlotPermit> tryReserveSlot(SlotReserveContext<SI> ctx) {
51	boolean gotOne = executorSlotsSemaphore.tryAcquire();	1✔
52	if (gotOne) {	1✔
53	return Optional.of(new SlotPermit());	1✔
54	}
55	return Optional.empty();	1✔
56	}
57
58	@Override
59	public void markSlotUsed(SlotMarkUsedContext<SI> ctx) {}	1✔
60
61	@Override
62	public void releaseSlot(SlotReleaseContext<SI> ctx) {
63	executorSlotsSemaphore.release();	1✔
64	}	1✔
65
66	@Override
67	public int getMaximumSlots() {
68	return numSlots;	1✔
69	}
70
71	@Override
72	public String toString() {
NEW 73	return "FixedSizeSlotSupplier{" + "numSlots=" + numSlots + '}';	×
74	}
75	}

temporalio / sdk-java / #244

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