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jSerialComm
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Merge pull request #352 from yigitpirildak/separate_tmpdir_across_applications 

Separate tmpdir across applications
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Will Hedgecock 2021-10-22 12:18:57 -05:00 committed by GitHub
parent b4791394c8 c1d49d8513
commit 956364b449
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7
README.md
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@ -7,6 +7,13 @@ _A platform-independent serial port access library for Java._
For usage examples, please refer to the [Usage wiki](https://github.com/Fazecast/jSerialComm/wiki/Usage-Examples). For usage examples, please refer to the [Usage wiki](https://github.com/Fazecast/jSerialComm/wiki/Usage-Examples).
If you intend to use the library in multiple applications simultaneously, please make sure
to set ```fazecast.jSerialComm.appid``` property before accessing the SerialPort class so that
applications don't accidentally delete each others temporary files during boot-up:
```
System.setProperty("fazecast.jSerialComm.appid", "YOUR_APPLICATION_IDENTIFIER")
```
In order to use the ```jSerialComm``` library in your own project, you must simply In order to use the ```jSerialComm``` library in your own project, you must simply
include the JAR file in your build path and import it like any other include the JAR file in your build path and import it like any other
Java package using ```import com.fazecast.jSerialComm.*;```. Java package using ```import com.fazecast.jSerialComm.*;```.

9
src/main/java/com/fazecast/jSerialComm/SerialPort.java
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@ -51,6 +51,9 @@ public final class SerialPort
{ {
// Static initializer loads correct native library for this machine // Static initializer loads correct native library for this machine
private static final String versionString = "2.7.0"; private static final String versionString = "2.7.0";
// Used to distinguish multiple processes running this lib
private static final String TMPDIR_APPID_PROPERTY = "fazecast.jSerialComm.appid";
private static volatile boolean isAndroid = false; private static volatile boolean isAndroid = false;
private static volatile boolean isUnixBased = false; private static volatile boolean isUnixBased = false;
private static volatile boolean isWindows = false; private static volatile boolean isWindows = false;
@ -62,7 +65,13 @@ public final class SerialPort
String tempFileDirectory = System.getProperty("java.io.tmpdir"); String tempFileDirectory = System.getProperty("java.io.tmpdir");
if ((tempFileDirectory.charAt(tempFileDirectory.length()-1) != '\\') && (tempFileDirectory.charAt(tempFileDirectory.length()-1) != '/')) if ((tempFileDirectory.charAt(tempFileDirectory.length()-1) != '\\') && (tempFileDirectory.charAt(tempFileDirectory.length()-1) != '/'))
tempFileDirectory += "/"; tempFileDirectory += "/";
// Make sure to use appId to separate tmpdir directories if library is used by multiple modules, so they don't erase each others folders accidentally.
String appId = System.getProperty(TMPDIR_APPID_PROPERTY, "");
tempFileDirectory += "jSerialComm/"; tempFileDirectory += "jSerialComm/";
if (!appId.isEmpty()) {
tempFileDirectory += appId + (!appId.endsWith("/") ? "/" : "");
}
deleteDirectory(new File(tempFileDirectory)); deleteDirectory(new File(tempFileDirectory));
// Determine Operating System and architecture // Determine Operating System and architecture