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[pinpoint-apm#8890] Merge all lib jars in custom filesystem
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youngjin.kim2
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Jun 16, 2022
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85 changes: 85 additions & 0 deletions
85
...ava/com/navercorp/pinpoint/bootstrap/java9/module/merger/InMemorySeekableByteChannel.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,85 @@ | ||
| /* | ||
| * Copyright 2022 NAVER Corp. | ||
| * | ||
| * 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. | ||
| */ | ||
| package com.navercorp.pinpoint.bootstrap.java9.module.merger; | ||
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| import java.nio.ByteBuffer; | ||
| import java.nio.channels.SeekableByteChannel; | ||
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| /** | ||
| * @author youngjin.kim2 | ||
| */ | ||
| public class InMemorySeekableByteChannel implements SeekableByteChannel { | ||
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| private final byte[] bytes; | ||
| private long position = 0; | ||
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| public InMemorySeekableByteChannel(byte[] bytes, long position) { | ||
| this(bytes); | ||
| this.position = Math.min(position, bytes.length); | ||
| } | ||
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| public InMemorySeekableByteChannel(byte[] bytes) { | ||
| this.bytes = bytes; | ||
| } | ||
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| @Override | ||
| public int read(ByteBuffer dst) { | ||
| if (position >= bytes.length) { | ||
| return -1; | ||
| } | ||
|
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| long remain = size() - position; | ||
| int sz = (int) Math.min(remain, dst.capacity()); | ||
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| dst.put(bytes, (int) position, sz); | ||
| position += sz; | ||
| return sz; | ||
| } | ||
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| @Override | ||
| public int write(ByteBuffer src) { | ||
| bytes[(int) position++] = src.get(); | ||
| return 1; | ||
| } | ||
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| @Override | ||
| public long position() { | ||
| return position; | ||
| } | ||
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| @Override | ||
| public SeekableByteChannel position(long newPosition) { | ||
| return new InMemorySeekableByteChannel(bytes, newPosition); | ||
| } | ||
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| @Override | ||
| public long size() { | ||
| return bytes.length; | ||
| } | ||
|
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| @Override | ||
| public SeekableByteChannel truncate(long size) { | ||
| throw new RuntimeException("Illegal truncate attempt"); | ||
| } | ||
|
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| @Override | ||
| public boolean isOpen() { | ||
| return true; | ||
| } | ||
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| @Override | ||
| public void close() {} | ||
| } |
116 changes: 116 additions & 0 deletions
116
...p-java9/src/main/java/com/navercorp/pinpoint/bootstrap/java9/module/merger/JarMerger.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,116 @@ | ||
| /* | ||
| * Copyright 2022 NAVER Corp. | ||
| * | ||
| * 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. | ||
| */ | ||
| package com.navercorp.pinpoint.bootstrap.java9.module.merger; | ||
|
|
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| import java.io.ByteArrayOutputStream; | ||
| import java.io.File; | ||
| import java.io.IOException; | ||
| import java.lang.module.ModuleFinder; | ||
| import java.net.URI; | ||
| import java.util.*; | ||
| import java.util.jar.JarEntry; | ||
| import java.util.jar.JarFile; | ||
| import java.util.jar.JarOutputStream; | ||
|
|
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| /** | ||
| * @author youngjin.kim2 | ||
| */ | ||
| public class JarMerger { | ||
|
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| private final Set<String> entries = new HashSet<>(); | ||
| private final Map<String, String> providesMap = new HashMap<>(); | ||
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| private final JarOutputStream jarStream; | ||
| private final ByteArrayOutputStream byteStream; | ||
| private final String moduleName; | ||
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| private JarMerger(String moduleName, List<URI> uris) throws IOException { | ||
| this.moduleName = moduleName; | ||
| this.byteStream = new ByteArrayOutputStream(); | ||
| this.jarStream = new JarOutputStream(byteStream); | ||
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| entries.add("META-INF/MANIFEST.MF"); | ||
| entries.add("module-info.class"); | ||
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| for (final URI uri: uris) { | ||
| add(uri); | ||
| } | ||
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| addManifest(); | ||
| addProvides(); | ||
| this.jarStream.close(); | ||
| } | ||
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| private void add(URI uri) throws IOException { | ||
| if (!uri.toString().endsWith(".jar")) { | ||
| return; | ||
| } | ||
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| final File file = new File(uri); | ||
| try (final JarFile jarFile = new JarFile(file)) { | ||
| final Enumeration<JarEntry> newEntries = jarFile.entries(); | ||
| while (newEntries.hasMoreElements()) { | ||
| final JarEntry newEntry = newEntries.nextElement(); | ||
| final String name = newEntry.getName(); | ||
|
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| if (name.startsWith("META-INF/services/")) { | ||
| final String provides = new String(jarFile.getInputStream(newEntry).readAllBytes()); | ||
| provides(name, provides); | ||
| } | ||
|
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| if (entries.contains(name)) { | ||
| continue; | ||
| } | ||
| entries.add(newEntry.getName()); | ||
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| addEntry(name, jarFile.getInputStream(newEntry).readAllBytes()); | ||
| } | ||
| } | ||
| } | ||
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| private void provides(String name, String provides) { | ||
| providesMap.put(name, providesMap.getOrDefault(name, "") + provides); | ||
| } | ||
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| public static ModuleFinder build(String moduleName, List<URI> uris) throws IOException { | ||
| return (new JarMerger(moduleName, uris)).getModuleFinder(); | ||
| } | ||
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| private ModuleFinder getModuleFinder() { | ||
| return ModuleFinder.of(SingleFileSystem.byteArrayToPath("combined.jar", byteStream.toByteArray())); | ||
| } | ||
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| private void addManifest() throws IOException { | ||
| addEntry("META-INF/MANIFEST.MF", getManifestContent().getBytes()); | ||
| } | ||
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| private void addProvides() throws IOException { | ||
| for (Map.Entry<String, String> e: providesMap.entrySet()) { | ||
| addEntry("META-INF/services/" + e.getKey(), e.getValue().getBytes()); | ||
| } | ||
| } | ||
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| private void addEntry(String name, byte[] bytes) throws IOException { | ||
| jarStream.putNextEntry(new JarEntry(name)); | ||
| jarStream.write(bytes); | ||
| jarStream.closeEntry(); | ||
| } | ||
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| private String getManifestContent() { | ||
| return "Manifest-Version: 1.0\r\nAutomatic-Module-Name: " + moduleName + "\r\n\r\n"; | ||
| } | ||
|
|
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| } |
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