Implements endpoint discovery callback (01f6292c) · Commits · e / os / android_frameworks_base

services/core/java/com/android/server/location/contexthub/ContextHubService.java

+14 −4

Original line number	Diff line number	Diff line
		@@ -798,7 +798,7 @@ public class ContextHubService extends IContextHubService.Stub {
		throws RemoteException {
		super.registerEndpoint_enforcePermission();
		if (mEndpointManager == null) {
		Log.e(TAG, "ContextHubService.registerEndpoint: endpoint manager failed to initialize");
		Log.e(TAG, "Endpoint manager failed to initialize");
		throw new UnsupportedOperationException("Endpoint registration is not supported");
		}
		return mEndpointManager.registerEndpoint(pendingHubEndpointInfo, callback);
		@@ -809,7 +809,8 @@ public class ContextHubService extends IContextHubService.Stub {
		public void registerEndpointDiscoveryCallbackId(
		long endpointId, IContextHubEndpointDiscoveryCallback callback) throws RemoteException {
		super.registerEndpointDiscoveryCallbackId_enforcePermission();
		// TODO(b/375487784): Implement this
		checkEndpointDiscoveryPreconditions();
		mHubInfoRegistry.registerEndpointDiscoveryCallback(endpointId, callback);
		}

		@android.annotation.EnforcePermission(android.Manifest.permission.ACCESS_CONTEXT_HUB)
		@@ -818,7 +819,8 @@ public class ContextHubService extends IContextHubService.Stub {
		String serviceDescriptor, IContextHubEndpointDiscoveryCallback callback)
		throws RemoteException {
		super.registerEndpointDiscoveryCallbackDescriptor_enforcePermission();
		// TODO(b/375487784): Implement this
		checkEndpointDiscoveryPreconditions();
		mHubInfoRegistry.registerEndpointDiscoveryCallback(serviceDescriptor, callback);
		}

		@android.annotation.EnforcePermission(android.Manifest.permission.ACCESS_CONTEXT_HUB)
		@@ -826,7 +828,15 @@ public class ContextHubService extends IContextHubService.Stub {
		public void unregisterEndpointDiscoveryCallback(IContextHubEndpointDiscoveryCallback callback)
		throws RemoteException {
		super.unregisterEndpointDiscoveryCallback_enforcePermission();
		// TODO(b/375487784): Implement this
		checkEndpointDiscoveryPreconditions();
		mHubInfoRegistry.unregisterEndpointDiscoveryCallback(callback);
		}

		private void checkEndpointDiscoveryPreconditions() {
		if (mHubInfoRegistry == null) {
		Log.e(TAG, "Hub endpoint registry failed to initialize");
		throw new UnsupportedOperationException("Endpoint discovery is not supported");
		}
		}

		/**

services/core/java/com/android/server/location/contexthub/HubInfoRegistry.java

+161 −1

Original line number	Diff line number	Diff line
		@@ -18,7 +18,9 @@ package com.android.server.location.contexthub;

		import android.hardware.contexthub.HubEndpointInfo;
		import android.hardware.contexthub.HubServiceInfo;
		import android.hardware.contexthub.IContextHubEndpointDiscoveryCallback;
		import android.hardware.location.HubInfo;
		import android.os.DeadObjectException;
		import android.os.RemoteException;
		import android.util.ArrayMap;
		import android.util.IndentingPrintWriter;
		@@ -29,6 +31,9 @@ import com.android.internal.annotations.GuardedBy;
		import java.util.ArrayList;
		import java.util.Collections;
		import java.util.List;
		import java.util.Objects;
		import java.util.Optional;
		import java.util.function.BiConsumer;

		class HubInfoRegistry implements ContextHubHalEndpointCallback.IEndpointLifecycleCallback {
		private static final String TAG = "HubInfoRegistry";
		@@ -43,6 +48,56 @@ class HubInfoRegistry implements ContextHubHalEndpointCallback.IEndpointLifecycl
		private final ArrayMap<HubEndpointInfo.HubEndpointIdentifier, HubEndpointInfo>
		mHubEndpointInfos = new ArrayMap<>();

		/**
		* A wrapper class that is used to store arguments to
		* ContextHubManager.registerEndpointCallback.
		*/
		private static class DiscoveryCallback {
		private final IContextHubEndpointDiscoveryCallback mCallback;
		private final Optional<Long> mEndpointId;
		private final Optional<String> mServiceDescriptor;

		DiscoveryCallback(IContextHubEndpointDiscoveryCallback callback, long endpointId) {
		mCallback = callback;
		mEndpointId = Optional.of(endpointId);
		mServiceDescriptor = Optional.empty();
		}

		DiscoveryCallback(IContextHubEndpointDiscoveryCallback callback, String serviceDescriptor) {
		mCallback = callback;
		mEndpointId = Optional.empty();
		mServiceDescriptor = Optional.of(serviceDescriptor);
		}

		public IContextHubEndpointDiscoveryCallback getCallback() {
		return mCallback;
		}

		/**
		* @param info The hub endpoint info to check
		* @return true if info matches
		*/
		public boolean isMatch(HubEndpointInfo info) {
		if (mEndpointId.isPresent()) {
		return mEndpointId.get() == info.getIdentifier().getEndpoint();
		}
		if (mServiceDescriptor.isPresent()) {
		for (HubServiceInfo serviceInfo : info.getServiceInfoCollection()) {
		if (mServiceDescriptor.get().equals(serviceInfo.getServiceDescriptor())) {
		return true;
		}
		}
		}
		return false;
		}
		}

		/* The list of discovery callbacks registered with the service */
		@GuardedBy("mCallbackLock")
		private final List<DiscoveryCallback> mEndpointDiscoveryCallbacks = new ArrayList<>();

		private final Object mCallbackLock = new Object();

		HubInfoRegistry(IContextHubWrapper contextHubWrapper) {
		mContextHubWrapper = contextHubWrapper;
		refreshCachedHubs();
		@@ -109,16 +164,50 @@ class HubInfoRegistry implements ContextHubHalEndpointCallback.IEndpointLifecycl
		mHubEndpointInfos.put(endpointInfo.getIdentifier(), endpointInfo);
		}
		}

		invokeForMatchingEndpoints(
		endpointInfos,
		(cb, infoList) -> {
		try {
		cb.onEndpointsStarted(infoList);
		} catch (RemoteException e) {
		if (e instanceof DeadObjectException) {
		Log.w(TAG, "onEndpointStarted: callback died, unregistering");
		unregisterEndpointDiscoveryCallback(cb);
		} else {
		Log.e(TAG, "Exception while calling onEndpointsStarted", e);
		}
		}
		});
		}

		@Override
		public void onEndpointStopped(
		HubEndpointInfo.HubEndpointIdentifier[] endpointIds, byte reason) {
		ArrayList<HubEndpointInfo> removedInfoList = new ArrayList<>();
		synchronized (mLock) {
		for (HubEndpointInfo.HubEndpointIdentifier endpointId : endpointIds) {
		mHubEndpointInfos.remove(endpointId);
		HubEndpointInfo info = mHubEndpointInfos.remove(endpointId);
		if (info != null) {
		removedInfoList.add(info);
		}
		}
		}

		invokeForMatchingEndpoints(
		removedInfoList.toArray(new HubEndpointInfo[removedInfoList.size()]),
		(cb, infoList) -> {
		try {
		cb.onEndpointsStopped(infoList, reason);
		} catch (RemoteException e) {
		if (e instanceof DeadObjectException) {
		Log.w(TAG, "onEndpointStopped: callback died, unregistering");
		unregisterEndpointDiscoveryCallback(cb);
		} else {
		Log.e(TAG, "Exception while calling onEndpointsStopped", e);
		}
		}
		});
		}

		/** Return a list of {@link HubEndpointInfo} that represents endpoints with the matching id. */
		@@ -151,6 +240,77 @@ class HubInfoRegistry implements ContextHubHalEndpointCallback.IEndpointLifecycl
		return searchResult;
		}

		/* package */
		void registerEndpointDiscoveryCallback(
		long endpointId, IContextHubEndpointDiscoveryCallback callback) {
		Objects.requireNonNull(callback, "callback cannot be null");
		synchronized (mCallbackLock) {
		checkCallbackAlreadyRegistered(callback);
		mEndpointDiscoveryCallbacks.add(new DiscoveryCallback(callback, endpointId));
		}
		}

		/* package */
		void registerEndpointDiscoveryCallback(
		String serviceDescriptor, IContextHubEndpointDiscoveryCallback callback) {
		Objects.requireNonNull(callback, "callback cannot be null");
		synchronized (mCallbackLock) {
		checkCallbackAlreadyRegistered(callback);
		mEndpointDiscoveryCallbacks.add(new DiscoveryCallback(callback, serviceDescriptor));
		}
		}

		/* package */
		void unregisterEndpointDiscoveryCallback(IContextHubEndpointDiscoveryCallback callback) {
		Objects.requireNonNull(callback, "callback cannot be null");
		synchronized (mCallbackLock) {
		for (DiscoveryCallback discoveryCallback : mEndpointDiscoveryCallbacks) {
		if (discoveryCallback.getCallback().asBinder() == callback.asBinder()) {
		mEndpointDiscoveryCallbacks.remove(discoveryCallback);
		break;
		}
		}
		}
		}

		private void checkCallbackAlreadyRegistered(
		IContextHubEndpointDiscoveryCallback callback) {
		synchronized (mCallbackLock) {
		for (DiscoveryCallback discoveryCallback : mEndpointDiscoveryCallbacks) {
		if (discoveryCallback.mCallback.asBinder() == callback.asBinder()) {
		throw new IllegalArgumentException("Callback is already registered");
		}
		}
		}
		}

		/**
		* Iterates through all registered discovery callbacks and invokes a given callback for those
		* that match the endpoints the callback is targeted for.
		*
		* @param endpointInfos The list of endpoint infos to check for a match.
		* @param consumer The callback to invoke, which consumes the callback object and the list of
		* matched endpoint infos.
		*/
		private void invokeForMatchingEndpoints(
		HubEndpointInfo[] endpointInfos,
		BiConsumer<IContextHubEndpointDiscoveryCallback, HubEndpointInfo[]> consumer) {
		synchronized (mCallbackLock) {
		for (DiscoveryCallback discoveryCallback : mEndpointDiscoveryCallbacks) {
		ArrayList<HubEndpointInfo> infoList = new ArrayList<>();
		for (HubEndpointInfo endpointInfo : endpointInfos) {
		if (discoveryCallback.isMatch(endpointInfo)) {
		infoList.add(endpointInfo);
		}
		}

		consumer.accept(
		discoveryCallback.getCallback(),
		infoList.toArray(new HubEndpointInfo[infoList.size()]));
		}
		}
		}

		void dump(IndentingPrintWriter ipw) {
		synchronized (mLock) {
		dumpLocked(ipw);