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• HeapProfiler.java

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com.github.kklisura.cdt.protocol.commands.HeapProfiler Maven / Gradle / Ivy

package com.github.kklisura.cdt.protocol.commands;

/*-
 * #%L
 * cdt-java-client
 * %%
 * Copyright (C) 2018 Kenan Klisura
 * %%
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file 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.
 * #L%
 */

import com.github.kklisura.cdt.protocol.events.heapprofiler.AddHeapSnapshotChunk;
import com.github.kklisura.cdt.protocol.events.heapprofiler.HeapStatsUpdate;
import com.github.kklisura.cdt.protocol.events.heapprofiler.LastSeenObjectId;
import com.github.kklisura.cdt.protocol.events.heapprofiler.ReportHeapSnapshotProgress;
import com.github.kklisura.cdt.protocol.events.heapprofiler.ResetProfiles;
import com.github.kklisura.cdt.protocol.support.annotations.EventName;
import com.github.kklisura.cdt.protocol.support.annotations.Experimental;
import com.github.kklisura.cdt.protocol.support.annotations.Optional;
import com.github.kklisura.cdt.protocol.support.annotations.ParamName;
import com.github.kklisura.cdt.protocol.support.annotations.Returns;
import com.github.kklisura.cdt.protocol.support.types.EventHandler;
import com.github.kklisura.cdt.protocol.support.types.EventListener;
import com.github.kklisura.cdt.protocol.types.heapprofiler.SamplingHeapProfile;
import com.github.kklisura.cdt.protocol.types.runtime.RemoteObject;

@Experimental
public interface HeapProfiler {

  /**
   * Enables console to refer to the node with given id via $x (see Command Line API for more
   * details $x functions).
   *
   * @param heapObjectId Heap snapshot object id to be accessible by means of $x command line API.
   */
  void addInspectedHeapObject(@ParamName("heapObjectId") String heapObjectId);

  void collectGarbage();

  void disable();

  void enable();

  /** @param objectId Identifier of the object to get heap object id for. */
  @Returns("heapSnapshotObjectId")
  String getHeapObjectId(@ParamName("objectId") String objectId);

  /** @param objectId */
  @Returns("result")
  RemoteObject getObjectByHeapObjectId(@ParamName("objectId") String objectId);

  /**
   * @param objectId
   * @param objectGroup Symbolic group name that can be used to release multiple objects.
   */
  @Returns("result")
  RemoteObject getObjectByHeapObjectId(
      @ParamName("objectId") String objectId,
      @Optional @ParamName("objectGroup") String objectGroup);

  @Returns("profile")
  SamplingHeapProfile getSamplingProfile();

  void startSampling();

  /**
   * @param samplingInterval Average sample interval in bytes. Poisson distribution is used for the
   *     intervals. The default value is 32768 bytes.
   */
  void startSampling(@Optional @ParamName("samplingInterval") Double samplingInterval);

  void startTrackingHeapObjects();

  /** @param trackAllocations */
  void startTrackingHeapObjects(@Optional @ParamName("trackAllocations") Boolean trackAllocations);

  @Returns("profile")
  SamplingHeapProfile stopSampling();

  void stopTrackingHeapObjects();

  /**
   * @param reportProgress If true 'reportHeapSnapshotProgress' events will be generated while
   *     snapshot is being taken when the tracking is stopped.
   */
  void stopTrackingHeapObjects(@Optional @ParamName("reportProgress") Boolean reportProgress);

  void takeHeapSnapshot();

  /**
   * @param reportProgress If true 'reportHeapSnapshotProgress' events will be generated while
   *     snapshot is being taken.
   */
  void takeHeapSnapshot(@Optional @ParamName("reportProgress") Boolean reportProgress);

  @EventName("addHeapSnapshotChunk")
  EventListener onAddHeapSnapshotChunk(EventHandler eventListener);

  /**
   * If heap objects tracking has been started then backend may send update for one or more
   * fragments
   */
  @EventName("heapStatsUpdate")
  EventListener onHeapStatsUpdate(EventHandler eventListener);

  /**
   * If heap objects tracking has been started then backend regularly sends a current value for last
   * seen object id and corresponding timestamp. If the were changes in the heap since last event
   * then one or more heapStatsUpdate events will be sent before a new lastSeenObjectId event.
   */
  @EventName("lastSeenObjectId")
  EventListener onLastSeenObjectId(EventHandler eventListener);

  @EventName("reportHeapSnapshotProgress")
  EventListener onReportHeapSnapshotProgress(
      EventHandler eventListener);

  @EventName("resetProfiles")
  EventListener onResetProfiles(EventHandler eventListener);
}