| /* |
| * 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. |
| */ |
| |
| package org.apache.datasketches.memory.tools.scripts; |
| |
| import java.io.File; |
| import java.nio.ByteBuffer; |
| import java.nio.ByteOrder; |
| |
| import org.apache.datasketches.memory.MapHandle; |
| import org.apache.datasketches.memory.Memory; |
| import org.apache.datasketches.memory.WritableHandle; |
| import org.apache.datasketches.memory.WritableMemory; |
| |
| public class CheckMemoryJar { |
| |
| public void printJDK() { |
| String JdkVersionString = System.getProperty("java.version"); |
| int JdkMajorVersion = getJavaMajorVersion(JdkVersionString); |
| println("JDK Full Version : " + JdkVersionString); |
| println("JDK Major Version: " + JdkMajorVersion); |
| println(""); |
| } |
| |
| public void checkHeapWritableMemory() { |
| try { |
| String str = "1 - Heap WritableMemory Successful"; |
| WritableMemory mem = WritableMemory.allocate(2 * str.length()); |
| writeReadAndPrintString(mem, str); |
| } catch (Exception ex) { |
| exitOnError("Heap Writable Memory", ex); |
| } |
| } |
| |
| public void checkAllocateDirect() throws Exception { |
| try { |
| String str = "2 - Allocate Direct Successful"; |
| WritableHandle wh = WritableMemory.allocateDirect(2 * str.length()); |
| WritableMemory wmem = wh.getWritable(); |
| writeReadAndPrintString(wmem, str); |
| wh.close(); |
| } catch (Exception ex) { |
| exitOnError("Allocate Direct", ex); |
| } |
| } |
| |
| public void checkByteBuffer() throws Exception { |
| try { |
| String str = "3 - Map ByteBuffer Successful"; |
| ByteBuffer bb = ByteBuffer.allocateDirect(2 * str.length()); |
| bb.order(ByteOrder.nativeOrder()); |
| WritableMemory wmem = WritableMemory.writableWrap(bb); |
| writeReadAndPrintString(wmem, str); |
| } catch (Exception ex) { |
| exitOnError("Map ByteBuffer", ex); |
| } |
| } |
| |
| public void checkMap(String mappedFilePath) throws Exception { |
| try { |
| String str = "4 - Memory Map Successful"; |
| File file = new File(mappedFilePath); |
| MapHandle mh = Memory.map(file); |
| Memory mem = mh.get(); |
| mh.close(); |
| println(str); |
| } catch (Exception ex) { |
| exitOnError("Memory Map", ex); |
| } |
| } |
| |
| public static void main(final String[] args) throws Exception { |
| if (args.length < 1) { |
| System.out.println("Please provide the full path to the memory mapped file!"); |
| System.exit(1); |
| } |
| |
| String mappedFilePath = args[0]; |
| CheckMemoryJar check = new CheckMemoryJar(); |
| check.printJDK(); |
| check.checkHeapWritableMemory(); |
| check.checkAllocateDirect(); |
| check.checkByteBuffer(); |
| check.checkMap(mappedFilePath); |
| println(""); |
| println("All checks passed."); |
| } |
| |
| /**********************/ |
| |
| private static void writeReadAndPrintString(WritableMemory wmem, String str) { |
| int len = str.length(); |
| char[] cArr1 = str.toCharArray(); |
| wmem.putCharArray(0, cArr1, 0, len); |
| char[] cArr2 = new char[len]; |
| wmem.getCharArray(0, cArr2, 0, len); |
| String s2 = String.valueOf(cArr2); |
| println(s2); |
| } |
| |
| private static void exitOnError(String checkName, Exception ex){ |
| println(checkName + " check failed. Error: " + ex.toString()); |
| System.exit(1); |
| } |
| |
| private static int getJavaMajorVersion(final String jdkVersion) { |
| int[] verArr = parseJavaVersion(jdkVersion); |
| return (verArr[0] == 1) ? verArr[1] : verArr[0]; |
| } |
| |
| /** |
| * Returns first two number groups of the java version string. |
| * @param jdkVersion the java version string from System.getProperty("java.version"). |
| * @return first two number groups of the java version string. |
| */ |
| private static int[] parseJavaVersion(final String jdkVersion) { |
| final int p0, p1; |
| try { |
| String[] parts = jdkVersion.trim().split("[^0-9\\.]");//grab only number groups and "." |
| parts = parts[0].split("\\."); //split out the number groups |
| p0 = Integer.parseInt(parts[0]); //the first number group |
| p1 = (parts.length > 1) ? Integer.parseInt(parts[1]) : 0; //2nd number group, or 0 |
| } catch (final NumberFormatException | ArrayIndexOutOfBoundsException e) { |
| throw new IllegalArgumentException("Improper Java -version string: " + jdkVersion + "\n" + e); |
| } |
| return new int[] {p0, p1}; |
| } |
| |
| private static void println(Object obj) { System.out.println(obj.toString()); } |
| } |