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feat: relocate protobuf configurations from java-core to gax-java (#1641
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gax-grpc/src/main/java/com/google/api/gax/grpc/nativeimage/ProtobufMessageFeature.java
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/* | ||
* Copyright 2022 Google LLC | ||
* | ||
* Redistribution and use in source and binary forms, with or without | ||
* modification, are permitted provided that the following conditions are | ||
* met: | ||
* | ||
* * Redistributions of source code must retain the above copyright | ||
* notice, this list of conditions and the following disclaimer. | ||
* * Redistributions in binary form must reproduce the above | ||
* copyright notice, this list of conditions and the following disclaimer | ||
* in the documentation and/or other materials provided with the | ||
* distribution. | ||
* * Neither the name of Google LLC nor the names of its | ||
* contributors may be used to endorse or promote products derived from | ||
* this software without specific prior written permission. | ||
* | ||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | ||
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | ||
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | ||
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | ||
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | ||
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | ||
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | ||
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | ||
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | ||
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | ||
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | ||
*/ | ||
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package com.google.api.gax.grpc.nativeimage; | ||
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import com.google.api.gax.nativeimage.NativeImageUtils; | ||
import com.oracle.svm.core.annotate.AutomaticFeature; | ||
import java.lang.reflect.Method; | ||
import java.util.Arrays; | ||
import java.util.List; | ||
import org.graalvm.nativeimage.hosted.Feature; | ||
import org.graalvm.nativeimage.hosted.RuntimeReflection; | ||
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/** | ||
* A optional feature which registers reflective usages of the GRPC Protobuf libraries. | ||
* | ||
* <p>This feature is only needed if you need to access proto objects reflectively (such as | ||
* printing/logging proto objects). | ||
*/ | ||
@AutomaticFeature | ||
final class ProtobufMessageFeature implements Feature { | ||
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// Proto classes to check on the classpath. | ||
private static final String PROTO_MESSAGE_CLASS = "com.google.protobuf.GeneratedMessageV3"; | ||
private static final String PROTO_ENUM_CLASS = "com.google.protobuf.ProtocolMessageEnum"; | ||
private static final String ENUM_VAL_DESCRIPTOR_CLASS = | ||
"com.google.protobuf.Descriptors$EnumValueDescriptor"; | ||
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// Prefixes of methods accessed reflectively by | ||
// com.google.protobuf.GeneratedMessageV3$ReflectionInvoker | ||
private static final List<String> METHOD_ACCESSOR_PREFIXES = | ||
Arrays.asList("get", "set", "has", "add", "clear", "newBuilder"); | ||
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@Override | ||
public void beforeAnalysis(BeforeAnalysisAccess access) { | ||
Class<?> protoMessageClass = access.findClassByName(PROTO_MESSAGE_CLASS); | ||
if (protoMessageClass != null) { | ||
Method internalAccessorMethod = | ||
NativeImageUtils.getMethodOrFail(protoMessageClass, "internalGetFieldAccessorTable"); | ||
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// Finds every class whose `internalGetFieldAccessorTable()` is reached and registers it. | ||
// `internalGetFieldAccessorTable()` is used downstream to access the class reflectively. | ||
access.registerMethodOverrideReachabilityHandler( | ||
(duringAccess, method) -> { | ||
registerFieldAccessors(method.getDeclaringClass()); | ||
registerFieldAccessors(getBuilderClass(method.getDeclaringClass())); | ||
}, | ||
internalAccessorMethod); | ||
} | ||
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Class<?> protoEnumClass = access.findClassByName(PROTO_ENUM_CLASS); | ||
if (protoEnumClass != null) { | ||
// Finds every reachable proto enum class and registers specific methods for reflection. | ||
access.registerSubtypeReachabilityHandler( | ||
(duringAccess, subtypeClass) -> { | ||
if (!PROTO_ENUM_CLASS.equals(subtypeClass.getName())) { | ||
Method method = | ||
NativeImageUtils.getMethodOrFail( | ||
subtypeClass, | ||
"valueOf", | ||
duringAccess.findClassByName(ENUM_VAL_DESCRIPTOR_CLASS)); | ||
RuntimeReflection.register(method); | ||
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method = NativeImageUtils.getMethodOrFail(subtypeClass, "getValueDescriptor"); | ||
RuntimeReflection.register(method); | ||
} | ||
}, | ||
protoEnumClass); | ||
} | ||
} | ||
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/** Given a proto class, registers the public accessor methods for the provided proto class. */ | ||
private static void registerFieldAccessors(Class<?> protoClass) { | ||
for (Method method : protoClass.getMethods()) { | ||
boolean hasAccessorPrefix = | ||
METHOD_ACCESSOR_PREFIXES.stream().anyMatch(prefix -> method.getName().startsWith(prefix)); | ||
if (hasAccessorPrefix) { | ||
RuntimeReflection.register(method); | ||
} | ||
} | ||
} | ||
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/** Given a proto class, returns the Builder nested class. */ | ||
private static Class<?> getBuilderClass(Class<?> protoClass) { | ||
for (Class<?> clazz : protoClass.getClasses()) { | ||
if (clazz.getName().endsWith("Builder")) { | ||
return clazz; | ||
} | ||
} | ||
return null; | ||
} | ||
} |