Policy Simulator API service.
Policy Simulator is a collection of endpoints for creating, running, and
viewing a Replay. A
Replay is a type of simulation that
lets you see how your principals' access to resources might change if you
changed your IAM policy.
During a Replay, Policy Simulator
re-evaluates, or replays, past access attempts under both the current policy
and your proposed policy, and compares those results to determine how your
principals' access might change under the proposed policy.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Hard to understand","hardToUnderstand","thumb-down"],["Incorrect information or sample code","incorrectInformationOrSampleCode","thumb-down"],["Missing the information/samples I need","missingTheInformationSamplesINeed","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-16 UTC."],[],[],null,["# Interface SimulatorGrpc.AsyncService (0.51.0)\n\nVersion latestkeyboard_arrow_down\n\n- [0.51.0 (latest)](/java/docs/reference/google-cloud-policysimulator/latest/com.google.cloud.policysimulator.v1.SimulatorGrpc.AsyncService)\n- [0.49.0](/java/docs/reference/google-cloud-policysimulator/0.49.0/com.google.cloud.policysimulator.v1.SimulatorGrpc.AsyncService)\n- [0.47.0](/java/docs/reference/google-cloud-policysimulator/0.47.0/com.google.cloud.policysimulator.v1.SimulatorGrpc.AsyncService)\n- [0.46.0](/java/docs/reference/google-cloud-policysimulator/0.46.0/com.google.cloud.policysimulator.v1.SimulatorGrpc.AsyncService)\n- [0.43.0](/java/docs/reference/google-cloud-policysimulator/0.43.0/com.google.cloud.policysimulator.v1.SimulatorGrpc.AsyncService)\n- [0.42.0](/java/docs/reference/google-cloud-policysimulator/0.42.0/com.google.cloud.policysimulator.v1.SimulatorGrpc.AsyncService)\n- [0.41.0](/java/docs/reference/google-cloud-policysimulator/0.41.0/com.google.cloud.policysimulator.v1.SimulatorGrpc.AsyncService)\n- [0.39.0](/java/docs/reference/google-cloud-policysimulator/0.39.0/com.google.cloud.policysimulator.v1.SimulatorGrpc.AsyncService)\n- [0.38.0](/java/docs/reference/google-cloud-policysimulator/0.38.0/com.google.cloud.policysimulator.v1.SimulatorGrpc.AsyncService)\n- [0.37.0](/java/docs/reference/google-cloud-policysimulator/0.37.0/com.google.cloud.policysimulator.v1.SimulatorGrpc.AsyncService)\n- [0.36.0](/java/docs/reference/google-cloud-policysimulator/0.36.0/com.google.cloud.policysimulator.v1.SimulatorGrpc.AsyncService)\n- [0.35.0](/java/docs/reference/google-cloud-policysimulator/0.35.0/com.google.cloud.policysimulator.v1.SimulatorGrpc.AsyncService)\n- [0.34.0](/java/docs/reference/google-cloud-policysimulator/0.34.0/com.google.cloud.policysimulator.v1.SimulatorGrpc.AsyncService)\n- [0.33.0](/java/docs/reference/google-cloud-policysimulator/0.33.0/com.google.cloud.policysimulator.v1.SimulatorGrpc.AsyncService)\n- [0.32.0](/java/docs/reference/google-cloud-policysimulator/0.32.0/com.google.cloud.policysimulator.v1.SimulatorGrpc.AsyncService)\n- [0.31.0](/java/docs/reference/google-cloud-policysimulator/0.31.0/com.google.cloud.policysimulator.v1.SimulatorGrpc.AsyncService)\n- [0.30.0](/java/docs/reference/google-cloud-policysimulator/0.30.0/com.google.cloud.policysimulator.v1.SimulatorGrpc.AsyncService)\n- [0.28.0](/java/docs/reference/google-cloud-policysimulator/0.28.0/com.google.cloud.policysimulator.v1.SimulatorGrpc.AsyncService)\n- [0.27.0](/java/docs/reference/google-cloud-policysimulator/0.27.0/com.google.cloud.policysimulator.v1.SimulatorGrpc.AsyncService)\n- [0.26.0](/java/docs/reference/google-cloud-policysimulator/0.26.0/com.google.cloud.policysimulator.v1.SimulatorGrpc.AsyncService)\n- [0.25.0](/java/docs/reference/google-cloud-policysimulator/0.25.0/com.google.cloud.policysimulator.v1.SimulatorGrpc.AsyncService)\n- [0.24.0](/java/docs/reference/google-cloud-policysimulator/0.24.0/com.google.cloud.policysimulator.v1.SimulatorGrpc.AsyncService)\n- [0.23.0](/java/docs/reference/google-cloud-policysimulator/0.23.0/com.google.cloud.policysimulator.v1.SimulatorGrpc.AsyncService)\n- [0.22.0](/java/docs/reference/google-cloud-policysimulator/0.22.0/com.google.cloud.policysimulator.v1.SimulatorGrpc.AsyncService)\n- [0.21.0](/java/docs/reference/google-cloud-policysimulator/0.21.0/com.google.cloud.policysimulator.v1.SimulatorGrpc.AsyncService)\n- [0.20.0](/java/docs/reference/google-cloud-policysimulator/0.20.0/com.google.cloud.policysimulator.v1.SimulatorGrpc.AsyncService)\n- [0.19.0](/java/docs/reference/google-cloud-policysimulator/0.19.0/com.google.cloud.policysimulator.v1.SimulatorGrpc.AsyncService)\n- [0.18.0](/java/docs/reference/google-cloud-policysimulator/0.18.0/com.google.cloud.policysimulator.v1.SimulatorGrpc.AsyncService)\n- [0.16.0](/java/docs/reference/google-cloud-policysimulator/0.16.0/com.google.cloud.policysimulator.v1.SimulatorGrpc.AsyncService)\n- [0.15.0](/java/docs/reference/google-cloud-policysimulator/0.15.0/com.google.cloud.policysimulator.v1.SimulatorGrpc.AsyncService)\n- [0.14.0](/java/docs/reference/google-cloud-policysimulator/0.14.0/com.google.cloud.policysimulator.v1.SimulatorGrpc.AsyncService)\n- [0.13.0](/java/docs/reference/google-cloud-policysimulator/0.13.0/com.google.cloud.policysimulator.v1.SimulatorGrpc.AsyncService)\n- [0.12.0](/java/docs/reference/google-cloud-policysimulator/0.12.0/com.google.cloud.policysimulator.v1.SimulatorGrpc.AsyncService)\n- [0.11.0](/java/docs/reference/google-cloud-policysimulator/0.11.0/com.google.cloud.policysimulator.v1.SimulatorGrpc.AsyncService)\n- [0.10.0](/java/docs/reference/google-cloud-policysimulator/0.10.0/com.google.cloud.policysimulator.v1.SimulatorGrpc.AsyncService)\n- [0.9.0](/java/docs/reference/google-cloud-policysimulator/0.9.0/com.google.cloud.policysimulator.v1.SimulatorGrpc.AsyncService)\n- [0.8.0](/java/docs/reference/google-cloud-policysimulator/0.8.0/com.google.cloud.policysimulator.v1.SimulatorGrpc.AsyncService)\n- [0.7.0](/java/docs/reference/google-cloud-policysimulator/0.7.0/com.google.cloud.policysimulator.v1.SimulatorGrpc.AsyncService)\n- [0.6.0](/java/docs/reference/google-cloud-policysimulator/0.6.0/com.google.cloud.policysimulator.v1.SimulatorGrpc.AsyncService)\n- [0.3.0](/java/docs/reference/google-cloud-policysimulator/0.3.0/com.google.cloud.policysimulator.v1.SimulatorGrpc.AsyncService)\n- [0.2.0](/java/docs/reference/google-cloud-policysimulator/0.2.0/com.google.cloud.policysimulator.v1.SimulatorGrpc.AsyncService)\n- [0.1.0](/java/docs/reference/google-cloud-policysimulator/0.1.0/com.google.cloud.policysimulator.v1.SimulatorGrpc.AsyncService) \n\n public static interface SimulatorGrpc.AsyncService\n\nPolicy Simulator API service.\nPolicy Simulator is a collection of endpoints for creating, running, and\nviewing a Replay. A\nReplay is a type of simulation that\nlets you see how your principals' access to resources might change if you\nchanged your IAM policy.\nDuring a Replay, Policy Simulator\nre-evaluates, or replays, past access attempts under both the current policy\nand your proposed policy, and compares those results to determine how your\nprincipals' access might change under the proposed policy.\n\nMethods\n-------\n\n### createReplay(CreateReplayRequest request, StreamObserver\\\u003cOperation\\\u003e responseObserver)\n\n public default void createReplay(CreateReplayRequest request, StreamObserver\u003cOperation\u003e responseObserver)\n\nCreates and starts a Replay using\nthe given ReplayConfig.\n\n### getReplay(GetReplayRequest request, StreamObserver\\\u003cReplay\\\u003e responseObserver)\n\n public default void getReplay(GetReplayRequest request, StreamObserver\u003cReplay\u003e responseObserver)\n\nGets the specified Replay. Each\n`Replay` is available for at least 7 days.\n\n### listReplayResults(ListReplayResultsRequest request, StreamObserver\\\u003cListReplayResultsResponse\\\u003e responseObserver)\n\n public default void listReplayResults(ListReplayResultsRequest request, StreamObserver\u003cListReplayResultsResponse\u003e responseObserver)\n\nLists the results of running a\nReplay."]]