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Merge pull request #867 from scouter-project/feature/866-exception-on…
…-java17 Feature/866 exception on java17
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118 changes: 118 additions & 0 deletions
118
scouter.agent.java/src/main/java/scouter/agent/util/ModuleUtil.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,118 @@ | ||
| /* | ||
| * Copyright 2015 the original author or authors. | ||
| * @https://github.com/scouter-project/scouter | ||
| * | ||
| * Licensed 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 scouter.agent.util; | ||
|
|
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| import java.lang.instrument.Instrumentation; | ||
| import java.lang.reflect.Method; | ||
| import java.util.HashMap; | ||
| import java.util.HashSet; | ||
| import java.util.Map; | ||
| import java.util.Set; | ||
| import scouter.agent.JavaAgent; | ||
| import scouter.agent.Logger; | ||
|
|
||
| /** | ||
| * refer to glowroot (https://github.com/glowroot/glowroot) | ||
| */ | ||
| public class ModuleUtil { | ||
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|
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| private static final ModuleUtil instance; | ||
|
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| static { | ||
| if (JavaAgent.isJava9plus()) { | ||
| instance = new ModuleUtil(); | ||
| } else { | ||
| instance = null; | ||
| } | ||
| } | ||
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| private final Method getModuleMethod; | ||
| private final Class<?> moduleClass; | ||
| private final Method redefineModuleMethod; | ||
|
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| private ModuleUtil() { | ||
| try { | ||
| getModuleMethod = Class.class.getMethod("getModule"); | ||
| moduleClass = Class.forName("java.lang.Module"); | ||
| redefineModuleMethod = Instrumentation.class.getMethod("redefineModule", | ||
| moduleClass, Set.class, Map.class, Map.class, Set.class, Map.class); | ||
| } catch (Exception e) { | ||
| throw new IllegalStateException(e); | ||
| } | ||
| } | ||
|
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| public static Object getModule(Class<?> clazz) throws Exception { | ||
| return instance.getModuleInternal(clazz); | ||
| } | ||
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| public static void grantAccess(Instrumentation instrumentation, String fromClassName, | ||
| String toClassName) throws Exception { | ||
| instance.grantAccessInternal(instrumentation, fromClassName, null, toClassName, null); | ||
| } | ||
|
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| public static void grantAccess(Instrumentation instrumentation, String fromClassName, | ||
| ClassLoader fromClassLoader, | ||
| String toClassName, ClassLoader toClassLoader) throws Exception { | ||
| instance.grantAccessInternal(instrumentation, fromClassName, fromClassLoader, toClassName, | ||
| toClassLoader); | ||
| } | ||
|
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| private Object getModuleInternal(Class<?> clazz) throws Exception { | ||
| // getModule() always returns non-null | ||
| return getModuleMethod.invoke(clazz); | ||
| } | ||
|
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| private void grantAccessInternal(Instrumentation instrumentation, String fromClassName, | ||
| ClassLoader fromClassLoader, | ||
| String toClassName, ClassLoader toClassLoader) throws Exception { | ||
| Class<?> fromClass; | ||
| try { | ||
| if (fromClassLoader == null) { | ||
| fromClass = Class.forName(fromClassName); | ||
| } else { | ||
| fromClass = Class.forName(fromClassName, true, fromClassLoader); | ||
| } | ||
| } catch (ClassNotFoundException e) { | ||
| Logger.println("MODULEUTIL-1", e.getMessage() + " : " + fromClassName, e); | ||
| return; | ||
| } | ||
| Class<?> toClass; | ||
| try { | ||
| if (toClassLoader == null) { | ||
| toClass = Class.forName(toClassName); | ||
| } else { | ||
| toClass = Class.forName(toClassName, true, toClassLoader); | ||
| } | ||
| } catch (ClassNotFoundException e) { | ||
| Logger.println("MODULEUTIL-2", e.getMessage() + " : " + toClassName, e); | ||
| return; | ||
| } | ||
| Map<String, Set<?>> extraOpens = new HashMap<>(); | ||
| Package pkg = toClass.getPackage(); | ||
| if (pkg != null) { | ||
| Set openSet = new HashSet(); | ||
| openSet.add(getModuleMethod.invoke(fromClass)); | ||
| extraOpens.put(pkg.getName(), openSet); | ||
| } | ||
| // getModule() always returns non-null | ||
| redefineModuleMethod.invoke(instrumentation, getModuleMethod.invoke(toClass), | ||
| new HashSet<>(), new HashMap<>(), extraOpens, new HashSet<>(), new HashMap<>()); | ||
| Logger.println("extra opens module. from = " + fromClassName + " to = " + toClassName); | ||
| } | ||
|
|
||
| } |