mirror of
https://github.com/facebook/rocksdb.git
synced 2024-12-04 20:02:50 +00:00
f8969ad7d4
Summary: Performance improvements for `get()` paths in the RocksJava API (JNI). Document describing the performance results. Replace uses of the legacy `DB::Get()` method wrapper returning data in a `std::string` with direct calls to `DB::Get()` passing a pinnable slice to receive this data. Copying from a pinned slice direct to the destination java byte array, without going via an intervening std::string, is a major performance gain for this code path. Note that this gain only comes where `DB::Get()` is able to return a pinned buffer; where it has to copy into the buffer owned by the slice, there is still the intervening copy and no performance gain. It may be possible to address this case too, but it is not trivial. Pull Request resolved: https://github.com/facebook/rocksdb/pull/10970 Reviewed By: pdillinger Differential Revision: D42125567 Pulled By: ajkr fbshipit-source-id: b7a4df7523b0420cadb1e9b6c7da3ec030a8da34
179 lines
7.2 KiB
XML
179 lines
7.2 KiB
XML
<?xml version="1.0" encoding="UTF-8"?>
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<project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
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<modelVersion>4.0.0</modelVersion>
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<groupId>org.rocksdb</groupId>
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<artifactId>rocksdbjni</artifactId>
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<version>${ROCKSDB_JAVA_VERSION}</version> <!-- this will be replaced by the Makefile's rocksdbjavageneratepom target -->
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<name>RocksDB JNI</name>
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<description>RocksDB fat jar that contains .so files for linux32 and linux64 (glibc and musl-libc), jnilib files
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for Mac OSX, and a .dll for Windows x64.
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</description>
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<url>https://rocksdb.org</url>
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<inceptionYear>2012</inceptionYear>
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<licenses>
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<license>
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<name>Apache License 2.0</name>
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<url>http://www.apache.org/licenses/LICENSE-2.0.html</url>
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<distribution>repo</distribution>
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</license>
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<license>
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<name>GNU General Public License, version 2</name>
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<url>http://www.gnu.org/licenses/gpl-2.0.html</url>
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<distribution>repo</distribution>
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</license>
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</licenses>
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<scm>
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<connection>scm:git:https://github.com/facebook/rocksdb.git</connection>
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<developerConnection>scm:git:https://github.com/facebook/rocksdb.git</developerConnection>
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<url>scm:git:https://github.com/facebook/rocksdb.git</url>
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</scm>
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<organization>
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<name>Facebook</name>
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<url>https://www.facebook.com</url>
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</organization>
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<developers>
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<developer>
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<name>Facebook</name>
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<email>help@facebook.com</email>
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<timezone>America/New_York</timezone>
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<roles>
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<role>architect</role>
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</roles>
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</developer>
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</developers>
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<mailingLists>
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<mailingList>
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<name>rocksdb - Google Groups</name>
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<subscribe>rocksdb-subscribe@googlegroups.com</subscribe>
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<unsubscribe>rocksdb-unsubscribe@googlegroups.com</unsubscribe>
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<post>rocksdb@googlegroups.com</post>
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<archive>https://groups.google.com/forum/#!forum/rocksdb</archive>
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</mailingList>
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</mailingLists>
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<properties>
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<project.build.source>1.8</project.build.source>
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<project.build.target>1.8</project.build.target>
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<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
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</properties>
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<build>
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<plugins>
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<plugin>
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<groupId>org.apache.maven.plugins</groupId>
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<artifactId>maven-compiler-plugin</artifactId>
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<version>3.2</version>
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<configuration>
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<source>${project.build.source}</source>
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<target>${project.build.target}</target>
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<encoding>${project.build.sourceEncoding}</encoding>
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</configuration>
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</plugin>
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<plugin>
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<groupId>org.apache.maven.plugins</groupId>
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<artifactId>maven-surefire-plugin</artifactId>
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<version>2.18.1</version>
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<configuration>
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<argLine>${argLine} -ea -Xcheck:jni -Djava.library.path=${project.build.directory}</argLine>
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<useManifestOnlyJar>false</useManifestOnlyJar>
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<useSystemClassLoader>false</useSystemClassLoader>
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<additionalClasspathElements>
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<additionalClasspathElement>${project.build.directory}/*</additionalClasspathElement>
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</additionalClasspathElements>
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</configuration>
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</plugin>
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<plugin>
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<groupId>org.jacoco</groupId>
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<artifactId>jacoco-maven-plugin</artifactId>
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<version>0.7.2.201409121644</version>
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<executions>
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<execution>
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<goals>
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<goal>prepare-agent</goal>
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</goals>
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</execution>
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<execution>
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<id>report</id>
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<phase>prepare-package</phase>
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<goals>
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<goal>report</goal>
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</goals>
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</execution>
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</executions>
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</plugin>
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<plugin>
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<groupId>org.codehaus.gmaven</groupId>
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<artifactId>groovy-maven-plugin</artifactId>
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<version>2.0</version>
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<executions>
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<execution>
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<phase>process-classes</phase>
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<goals>
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<goal>execute</goal>
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</goals>
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<configuration>
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<defaults>
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<name>Xenu</name>
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</defaults>
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<source>
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String fileContents = new File(project.basedir.absolutePath + '/../include/rocksdb/version.h').getText('UTF-8')
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matcher = (fileContents =~ /(?s).*ROCKSDB_MAJOR ([0-9]+).*?/)
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String major_version = matcher.getAt(0).getAt(1)
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matcher = (fileContents =~ /(?s).*ROCKSDB_MINOR ([0-9]+).*?/)
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String minor_version = matcher.getAt(0).getAt(1)
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matcher = (fileContents =~ /(?s).*ROCKSDB_PATCH ([0-9]+).*?/)
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String patch_version = matcher.getAt(0).getAt(1)
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String version = String.format('%s.%s.%s', major_version, minor_version, patch_version)
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// Set version to be used in pom.properties
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project.version = version
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// Set version to be set as jar name
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project.build.finalName = project.artifactId + "-" + version
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</source>
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</configuration>
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</execution>
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</executions>
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</plugin>
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</plugins>
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</build>
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<dependencies>
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<dependency>
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<groupId>junit</groupId>
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<artifactId>junit</artifactId>
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<version>4.13.1</version>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>org.hamcrest</groupId>
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<artifactId>hamcrest</artifactId>
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<version>2.2</version>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>cglib</groupId>
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<artifactId>cglib</artifactId>
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<version>3.3.0</version>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>org.assertj</groupId>
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<artifactId>assertj-core</artifactId>
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<version>2.9.0</version>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>org.mockito</groupId>
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<artifactId>mockito-all</artifactId>
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<version>1.10.19</version>
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<scope>test</scope>
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</dependency>
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</dependencies>
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</project>
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