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/*
* ApplicationInsights-Java
* Copyright (c) Microsoft Corporation
* All rights reserved.
*
* MIT License
* Permission is hereby granted, free of charge, to any person obtaining a copy of this
* software and associated documentation files (the ""Software""), to deal in the Software
* without restriction, including without limitation the rights to use, copy, modify, merge,
* publish, distribute, sublicense, and/or sell copies of the Software, and to permit
* persons to whom the Software is furnished to do so, subject to the following conditions:
* The above copyright notice and this permission notice shall be included in all copies or
* substantial portions of the Software.
* THE SOFTWARE IS PROVIDED *AS IS*, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
* INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
* PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
* FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
package com.microsoft.applicationinsights.internal.perfcounter;
import com.microsoft.applicationinsights.internal.logger.InternalLogger;
import com.microsoft.applicationinsights.internal.system.SystemInformation;
import com.google.common.base.Preconditions;
import com.google.common.base.Strings;
import com.microsoft.applicationinsights.internal.util.LocalFileSystemUtils;
import com.microsoft.applicationinsights.internal.util.PropertyHelper;
import org.apache.commons.io.FileUtils;
import org.apache.commons.io.IOUtils;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Properties;
/**
* This class serves as the connection to the native code that does the work with Windows.
*
* Created by gupele on 3/30/2015.
*/
public final class JniPCConnector {
public static final String AI_BASE_FOLDER = "AISDK";
public static final String AI_NATIVE_FOLDER = "native";
public static final String PROCESS_SELF_INSTANCE_NAME = "__SELF__";
private static final String BITS_MODEL_64 = "64";
private static final String NATIVE_LIBRARY_64 = "applicationinsights-core-native-win64.dll";
private static final String NATIVE_LIBRARY_32 = "applicationinsights-core-native-win32.dll";
private static String currentInstanceName;
// Native methods are private and can be accessed through matching public methods in the class.
private native static String getInstanceName(int processId);
private native static String addCounter(String category, String counter, String instance);
private native static double getPerformanceCounterValue(String name);
/**
* This method must be called before any other method.
* All other methods are relevant only if this method was successful.
*
* Note that the method should not throw and should gracefully return the boolean value.
* @return True on success.
*/
public static boolean initialize() {
try {
if (!SystemInformation.INSTANCE.isWindows()) {
InternalLogger.INSTANCE.error("Jni connector is only used on Windows OS.");
return false;
}
loadNativeLibrary();
} catch (ThreadDeath td) {
throw td;
} catch (Throwable e) {
try {
InternalLogger.INSTANCE.error(
"Failed to load native dll, Windows performance counters will not be used. " +
"Please make sure that Visual C++ Redistributable is properly installed: %s.", e.toString());
return false;
} catch (ThreadDeath td) {
throw td;
} catch (Throwable t2) {
// chomp
}
}
return true;
}
/**
* Adding a performance counter
* @param category The category must be non null non empty value.
* @param counter The counter must be non null non empty value.
* @param instance The instance.
* @return True on success.
*/
public static String addPerformanceCounter(String category, String counter, String instance) {
Preconditions.checkArgument(!Strings.isNullOrEmpty(category), "category must be non-null non empty string.");
Preconditions.checkArgument(!Strings.isNullOrEmpty(counter), "counter must be non-null non empty string.");
return addCounter(category, counter, instance);
}
/**
* Process instance name is only known at runtime, therefore process level performance counters
* should use the 'PROCESS_SELF_INSTANCE_NAME' as the requested process name and then call this
* method to translate that logical name into the actual name that is fetched from the native code.
* @param instanceName The raw instance name
* @return The actual instance name.
* @throws Exception If instanceName equals PROCESS_SELF_INSTANCE_NAME but the actual instance name is unknown.
*/
public static String translateInstanceName(String instanceName) throws Exception {
if (PROCESS_SELF_INSTANCE_NAME.equals(instanceName)) {
if (Strings.isNullOrEmpty(currentInstanceName)) {
throw new Exception("Cannot translate instance name: Unknown current instance name");
}
return currentInstanceName;
}
return instanceName;
}
/**
* This method will delegate the call to the native code after the proper sanity checks.
* @param name The logical name of the performance counter as was fetched during the 'addPerformanceCounter' call.
* @return The current value.
*/
public static double getValueOfPerformanceCounter(String name) {
Preconditions.checkArgument(!Strings.isNullOrEmpty(name), "name must be non-null non empty value.");
return getPerformanceCounterValue(name);
}
private static void initNativeCode() {
int processId = Integer.parseInt(SystemInformation.INSTANCE.getProcessId());
currentInstanceName = getInstanceName(processId);
if (Strings.isNullOrEmpty(currentInstanceName)) {
InternalLogger.INSTANCE.error("Failed to fetch current process instance name, process counters for for the process level will not be activated.");
} else {
InternalLogger.INSTANCE.trace("Java process name is set to '%s'", currentInstanceName);
}
}
/**
* The method will try to extract the dll for the Windows performance counters to a local
* folder and then will try to load it. The method will do all that by doing the following things:
* 1. Find the OS type (64/32) currently supports only 64 bit.
* 2. Will find the path to extract to, which is %temp%/AI_BASE_FOLDER/AI_NATIVE_FOLDER/sdk_version_number
* 3. Find out whether or not the file already exists in that directory
* 4. If the dll is not there, the method will extract it from the jar to that directory
* 5. The method will call System.load to load the dll and by doing so we are ready to use it
* @return true on success, otherwise false
* @throws IOException If there are errors in opening/writing/reading/closing etc.
* Note that the method might throw RuntimeExceptions due to critical issues
*/
private static void loadNativeLibrary() throws IOException {
String model = System.getProperty("sun.arch.data.model");
String libraryToLoad = BITS_MODEL_64.equals(model) ? NATIVE_LIBRARY_64 : NATIVE_LIBRARY_32;
File dllPath = buildDllLocalPath();
File dllOnDisk = new File(dllPath, libraryToLoad);
if (!dllOnDisk.exists()) {
extractToLocalFolder(dllOnDisk, libraryToLoad);
}
System.load(dllOnDisk.toString());
initNativeCode();
InternalLogger.INSTANCE.trace("Successfully loaded library '%s'", libraryToLoad);
}
private static void extractToLocalFolder(File dllOnDisk, String libraryToLoad) throws IOException {
InputStream in = JniPCConnector.class.getClassLoader().getResourceAsStream(libraryToLoad);
if (in == null) {
throw new RuntimeException(String.format("Failed to find '%s' in jar", libraryToLoad));
}
OutputStream out = null;
try {
out = FileUtils.openOutputStream(dllOnDisk);
IOUtils.copy(in, out);
InternalLogger.INSTANCE.trace("Successfully extracted '%s' to local folder", libraryToLoad);
} finally {
if (in != null) {
try {
in.close();
} catch (IOException e) {
InternalLogger.INSTANCE.error("Failed to close input stream for dll extraction: %s", e.toString());
}
}
if (out != null) {
try {
out.close();
} catch (IOException e) {
InternalLogger.INSTANCE.error("Failed to close output stream for dll extraction: %s", e.toString());
}
}
}
}
private static File buildDllLocalPath() {
Properties properties = PropertyHelper.getSdkVersionProperties();
if (properties == null) {
throw new RuntimeException("Failed to find SDK Version Properties file.");
}
String version = properties.getProperty("version");
if (version == null) {
throw new RuntimeException("Failed to find SDK version.");
}
File dllPath = LocalFileSystemUtils.getTempDir();
dllPath = new File(dllPath.toString(), AI_BASE_FOLDER);
dllPath = new File(dllPath.toString(), AI_NATIVE_FOLDER);
dllPath = new File(dllPath.toString(), version);
if (!dllPath.exists()) {
dllPath.mkdirs();
}
if (!dllPath.exists() || !dllPath.canRead() || !dllPath.canWrite()) {
throw new RuntimeException("Failed to create a read/write folder for the native dll.");
}
InternalLogger.INSTANCE.trace("%s folder exists", dllPath.toString());
return dllPath;
}
}