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using ASM and ByteBuddy to create GetRequest's and Scanner's subclasses
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s2core/src/main/scala/org/apache/s2graph/core/storage/hbase/AsynchbasePatcher.scala
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| /* | ||
| * Licensed to the Apache Software Foundation (ASF) under one | ||
| * or more contributor license agreements. See the NOTICE file | ||
| * distributed with this work for additional information | ||
| * regarding copyright ownership. The ASF licenses this file | ||
| * to you 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. | ||
| */ | ||
|
|
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| package org.apache.s2graph.core.storage.hbase | ||
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| import java.lang.Integer.valueOf | ||
| import java.nio.charset.StandardCharsets | ||
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| import net.bytebuddy.ByteBuddy | ||
| import net.bytebuddy.description.modifier.Visibility.PUBLIC | ||
| import net.bytebuddy.dynamic.loading.ClassLoadingStrategy | ||
| import net.bytebuddy.implementation.FieldAccessor | ||
| import net.bytebuddy.implementation.MethodDelegation.to | ||
| import net.bytebuddy.matcher.ElementMatchers._ | ||
| import org.apache.commons.io.IOUtils | ||
| import org.hbase.async.GetRequestExtra.GetRequestExtra | ||
| import org.hbase.async.ScannerExtra.ScannerExtra | ||
| import org.hbase.async._ | ||
| import org.objectweb.asm.Opcodes.{ACC_FINAL, ACC_PRIVATE, ACC_PROTECTED, ACC_PUBLIC} | ||
| import org.objectweb.asm._ | ||
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| import scala.collection.JavaConversions._ | ||
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| /** | ||
| * Upon initialization, it loads a patched version of Asynchbase's GetRequest and Scanner class, | ||
| * modified using ASM to make the classes non-final and their methods are all public, | ||
| * so that ByteBuddy can create subclasses of them. | ||
| * | ||
| * This object has to be initialized before any access to (i.e. any classloading of) Asynchbase, | ||
| * since the ClassLoader does not allow redefining already loaded classes unless we use instrumentation. | ||
| */ | ||
| object AsynchbasePatcher { | ||
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| /** invoking this method will force loading this class, thus triggering the patch mechanism below */ | ||
| def init(): Unit = { | ||
| assert(getRequestClass.getMethod("setStoreLimit", classOf[Int]) != null) | ||
| assert(getRequestClass.getMethod("setStoreOffset", classOf[Int]) != null) | ||
| assert(scannerClass.getMethod("setRpcTimeout", classOf[Int]) != null) | ||
| } | ||
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| /** instantiates a new GetRequest, patched to support storeLimit/storeOffset */ | ||
| def newGetRequest(table: Array[Byte], key: Array[Byte], family: Array[Byte]): GetRequestExtra = { | ||
| getRequestClass.getConstructor(BA, BA, BA) | ||
| .newInstance(table, key, family).asInstanceOf[GetRequestExtra] | ||
| } | ||
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| /** instantiates a new GetRequest, patched to support storeLimit/storeOffset */ | ||
| def newGetRequest(table: Array[Byte], key: Array[Byte], family: Array[Byte], qualifier: Array[Byte]): GetRequestExtra = { | ||
| getRequestClass.getConstructor(BA, BA, BA, BA) | ||
| .newInstance(table, key, family, qualifier).asInstanceOf[GetRequestExtra] | ||
| } | ||
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| /** instantiate a new Scanner, patched to support RPC timeout */ | ||
| def newScanner(client: HBaseClient, table: Array[Byte]): ScannerExtra = { | ||
| val constructor = scannerClass.getConstructor(classOf[HBaseClient], BA) | ||
| constructor.setAccessible(true) | ||
| constructor.newInstance(client, table).asInstanceOf[ScannerExtra] | ||
| } | ||
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| /** instantiate a new Scanner, patched to support RPC timeout */ | ||
| def newScanner(client: HBaseClient, table: String): ScannerExtra = { | ||
| newScanner(client, table.getBytes(StandardCharsets.UTF_8)) | ||
| } | ||
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| private val BA = classOf[Array[Byte]] | ||
| private val classLoader = getClass.getClassLoader | ||
| private val defineClass = classOf[ClassLoader].getDeclaredMethod("defineClass", classOf[String], classOf[Array[Byte]], classOf[Int], classOf[Int]) | ||
| defineClass.setAccessible(true) | ||
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| /** loads Asynchbase classes from s2core's classpath | ||
| * *MUST* be called before any access to those classes, | ||
| * otherwise the classloading will fail with an "attempted duplicate class definition" error. | ||
| **/ | ||
| private def loadClass(name: String): Class[_] = { | ||
| classLoader.getResources(s"org/hbase/async/$name.class").toSeq.headOption match { | ||
| case Some(url) => | ||
| val stream = url.openStream() | ||
| val bytes = try { IOUtils.toByteArray(stream) } finally { stream.close() } | ||
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| // patch the bytecode so that the class is no longer final and the methods are all accessible | ||
| val cw = new ClassWriter(ClassWriter.COMPUTE_FRAMES) | ||
| new ClassReader(bytes).accept(new ClassAdapter(cw) { | ||
| override def visit(version: Int, access: Int, name: String, signature: String, superName: String, interfaces: Array[String]): Unit = { | ||
| super.visit(version, access & ~ACC_FINAL, name, signature, superName, interfaces) | ||
| } | ||
| override def visitMethod(access: Int, name: String, desc: String, signature: String, exceptions: Array[String]): MethodVisitor = { | ||
| super.visitMethod(access & ~ACC_PRIVATE & ~ACC_PROTECTED & ~ACC_FINAL | ACC_PUBLIC, name, desc, signature, exceptions) | ||
| } | ||
| }, 0) | ||
| val patched = cw.toByteArray | ||
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| defineClass.invoke(classLoader, s"org.hbase.async.$name", patched, valueOf(0), valueOf(patched.length)).asInstanceOf[Class[_]] | ||
| case None => | ||
| throw new ClassNotFoundException(s"Could not find Asynchbase class: $name") | ||
| } | ||
| } | ||
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| /** a java.lang.Class instance for the patched GetRequest class */ | ||
| private val getRequestClass: Class[_] = { | ||
| new ByteBuddy() | ||
| .subclass(loadClass("GetRequest")) | ||
| .name("org.hbase.async.GetRequestEx") | ||
| .implement(classOf[GetRequestExtra.IsGetRequest]) | ||
| .implement(classOf[GetRequestExtra.StoreLimitOffset]).intercept(FieldAccessor.ofBeanProperty()) | ||
| .defineField("storeLimit", classOf[Int], PUBLIC) | ||
| .defineField("storeOffset", classOf[Int], PUBLIC) | ||
| .method(named("serialize")).intercept(to(GetRequestExtra)) | ||
| .make.load(classLoader, ClassLoadingStrategy.Default.INJECTION).getLoaded | ||
| } | ||
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| /** a java.lang.Class instance for the patched Scanner class */ | ||
| private val scannerClass = { | ||
| new ByteBuddy() | ||
| .subclass(loadClass("Scanner")) | ||
| .name("org.hbase.async.ScannerEx") | ||
| .implement(classOf[ScannerExtra.RpcTimeout]).intercept(FieldAccessor.ofBeanProperty()) | ||
| .defineField("rpcTimeout", classOf[Int], PUBLIC) | ||
| .method(named("getNextRowsRequest")).intercept(to(ScannerExtra)) | ||
| .make.load(classLoader, ClassLoadingStrategy.Default.INJECTION).getLoaded | ||
| } | ||
|
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| } |
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96
s2core/src/main/scala/org/hbase/async/GetRequestExtra.scala
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,96 @@ | ||
| /* | ||
| * Licensed to the Apache Software Foundation (ASF) under one | ||
| * or more contributor license agreements. See the NOTICE file | ||
| * distributed with this work for additional information | ||
| * regarding copyright ownership. The ASF licenses this file | ||
| * to you 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. | ||
| */ | ||
|
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| package org.hbase.async | ||
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| import net.bytebuddy.implementation.bind.annotation.This | ||
| import org.hbase.async.generated.HBasePB.TimeRange | ||
| import org.hbase.async.generated.{FilterPB, ClientPB} | ||
| import org.jboss.netty.buffer.ChannelBuffer | ||
|
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| object GetRequestExtra { | ||
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| trait IsGetRequest { | ||
| def isGetRequest: Boolean | ||
| } | ||
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| trait StoreLimitOffset { | ||
| def getStoreLimit: Int | ||
| def getStoreOffset: Int | ||
| def setStoreLimit(storeLimit: Int): Unit | ||
| def setStoreOffset(storeOffset: Int): Unit | ||
| } | ||
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| type GetRequestExtra = org.hbase.async.GetRequest with IsGetRequest with StoreLimitOffset | ||
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| def serialize(server_version: Byte, @This request: GetRequestExtra): ChannelBuffer = { | ||
| val getpb = ClientPB.Get.newBuilder.setRow(Bytes.wrap(request.key())) | ||
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| if (request.family != null) { | ||
| val column = ClientPB.Column.newBuilder | ||
| column.setFamily(Bytes.wrap(request.family)) | ||
| if (request.qualifiers != null) { | ||
| for (qualifier <- request.qualifiers) { | ||
| column.addQualifier(Bytes.wrap(qualifier)) | ||
| } | ||
| } | ||
| getpb.addColumn(column.build) | ||
| } | ||
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| // Filters | ||
| val filter = request.getFilter | ||
| if (filter != null) { | ||
| getpb.setFilter(FilterPB.Filter.newBuilder.setNameBytes(Bytes.wrap(filter.name)).setSerializedFilter(Bytes.wrap(filter.serialize)).build) | ||
| } | ||
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| // TimeRange | ||
| val min_ts = request.getMinTimestamp | ||
| val max_ts = request.getMaxTimestamp | ||
| if (min_ts != 0 || max_ts != Long.MaxValue) { | ||
| val time = TimeRange.newBuilder | ||
| if (min_ts != 0) { | ||
| time.setFrom(min_ts) | ||
| } | ||
| if (max_ts != Long.MaxValue) { | ||
| time.setTo(max_ts) | ||
| } | ||
| getpb.setTimeRange(time.build) | ||
| } | ||
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| if (request.maxVersions != 1) { | ||
| getpb.setMaxVersions(request.maxVersions) | ||
| } | ||
| if (!request.isGetRequest) { | ||
| getpb.setExistenceOnly(true) | ||
| } | ||
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| // storeOffset and storeLimit | ||
| if (request.getStoreLimit >= 0) { | ||
| getpb.setStoreLimit(request.getStoreLimit) | ||
| } | ||
| if (request.getStoreOffset != 0) { | ||
| getpb.setStoreOffset(request.getStoreOffset) | ||
| } | ||
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| val get = ClientPB.GetRequest.newBuilder.setRegion(request.region.toProtobuf).setGet(getpb.build) | ||
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| HBaseRpc.toChannelBuffer(GetRequest.GGET, get.build) | ||
| } | ||
|
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| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,44 @@ | ||
| /* | ||
| * Licensed to the Apache Software Foundation (ASF) under one | ||
| * or more contributor license agreements. See the NOTICE file | ||
| * distributed with this work for additional information | ||
| * regarding copyright ownership. The ASF licenses this file | ||
| * to you 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. | ||
| */ | ||
|
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| package org.hbase.async | ||
|
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| import java.util.concurrent.Callable | ||
|
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| import net.bytebuddy.implementation.bind.annotation.{SuperCall, This} | ||
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| object ScannerExtra { | ||
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| trait RpcTimeout { | ||
| def getRpcTimeout: Int | ||
| def setRpcTimeout(timeout: Int): Unit | ||
| } | ||
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| type ScannerExtra = Scanner with RpcTimeout | ||
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| def getNextRowsRequest(@This scanner: ScannerExtra, @SuperCall getNextRowsRequest: Callable[HBaseRpc]): HBaseRpc = { | ||
| val request = getNextRowsRequest.call() | ||
| val rpcTimeout = scanner.getRpcTimeout | ||
| if (rpcTimeout > 0) { | ||
| request.setTimeout(rpcTimeout) | ||
| } | ||
| request | ||
| } | ||
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| } |