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android: Use Provider to construct OkHttpChannelBuilder #9003

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merged 1 commit into from Mar 24, 2022
Merged

android: Use Provider to construct OkHttpChannelBuilder #9003

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35 changes: 27 additions & 8 deletions android/src/main/java/io/grpc/android/AndroidChannelBuilder.java
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Expand Up @@ -55,14 +55,33 @@ public final class AndroidChannelBuilder extends ForwardingChannelBuilder<Androi

private static final String LOG_TAG = "AndroidChannelBuilder";

@Nullable private static final Class<?> OKHTTP_CHANNEL_BUILDER_CLASS = findOkHttp();
@Nullable private static final Object OKHTTP_CHANNEL_PROVIDER = findOkHttp();

private static Class<?> findOkHttp() {
private static Object findOkHttp() {
Class<?> klass;
try {
return Class.forName("io.grpc.okhttp.OkHttpChannelBuilder");
klass = Class.forName("io.grpc.okhttp.OkHttpChannelProvider");
} catch (ClassNotFoundException e) {
Log.w(LOG_TAG, "Failed to find OkHttpChannelProvider", e);
return null;
}
Object provider;
try {
provider = klass.getConstructor().newInstance();
} catch (Exception e) {
Log.w(LOG_TAG, "Failed to construct OkHttpChannelProvider", e);
return null;
}
try {
if (!(Boolean) klass.getMethod("isAvailable").invoke(provider)) {
Log.w(LOG_TAG, "OkHttpChannelProvider.isAvailable() returned false");
return null;
}
} catch (Exception e) {
Log.w(LOG_TAG, "Failed to check OkHttpChannelProvider.isAvailable()", e);
return null;
}
return provider;
}

private final ManagedChannelBuilder<?> delegateBuilder;
Expand Down Expand Up @@ -113,15 +132,15 @@ public static AndroidChannelBuilder usingBuilder(ManagedChannelBuilder<?> builde
}

private AndroidChannelBuilder(String target) {
if (OKHTTP_CHANNEL_BUILDER_CLASS == null) {
throw new UnsupportedOperationException("No ManagedChannelBuilder found on the classpath");
if (OKHTTP_CHANNEL_PROVIDER == null) {
throw new UnsupportedOperationException("Unable to load OkHttpChannelProvider");
}
try {
delegateBuilder =
(ManagedChannelBuilder)
OKHTTP_CHANNEL_BUILDER_CLASS
.getMethod("forTarget", String.class)
.invoke(null, target);
OKHTTP_CHANNEL_PROVIDER.getClass()
.getMethod("builderForTarget", String.class)
.invoke(OKHTTP_CHANNEL_PROVIDER, target);
} catch (Exception e) {
throw new RuntimeException("Failed to create ManagedChannelBuilder", e);
}
Expand Down