目標是在執行測試時從屬性文件讀取名爲'environment'的參數。測試由Maven執行,但是具有測試的應用程序在WebSphere服務器中運行。讀取位於JVM lib目錄中的測試中的屬性文件
的問題
問題的原因是,在WebSphere我的一個ClassLoader有那裏有很多罈子裏的目錄和WebSphere負荷所有的人,這樣在服務器共享運行的所有應用程序相同的罐子。在該目錄中我有一個屬性文件(姑且稱之爲environment.properties),並且給我的環境的值作爲一個字符串,這就是所謂的下一個方式靜態方法:
String environment = EnvironmentVariables.getEnvironment();
的,履行方法是這樣的:
Properties properties = new Properties();
InputStream inputStream = EnvironmentVariables.class.getClassLoader().getResourceAsStream("environment.properties");
if (inputStream == null) {
inputStream = new FileInputStream("c:\\environment.properties");
}
properties.load(inputStream);
inputStream.close();
return properties.getProperty("entorno");
正如你所看到的,這隻會在同一類加載器加載屬性文件和類EnvironmentVariables工作(或當屬性文件位於C:\ environment.properties) 。但是在運行測試時,maven的類加載器將加載EnvironmentVariables類,並且JVM的類加載器將加載屬性文件,對嗎?
所以我把屬性文件在JVM目錄:
/Library/Java/JavaVirtualMachines/jdk1.7.0_79.jdk/Contents/Home/jre/lib/environment.properties
,並試圖獲得下一個測試環境的價值:
@Test
public void readEnvironment() throws IOException {
final Properties properties = new Properties();
final InputStream inputStream = String.class.getClassLoader().getResourceAsStream("environment.properties");
properties.load(inputStream);
inputStream.close();
final String environment = properties.getProperty("environment");
Assert.assertEquals("LOCAL", environment);
}
但它給我跑mvn clean test
一個顯示java.lang.NullPointerException:
Running ReadEnvironmentTest
Tests run: 1, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 0.056 sec <<< FAILURE!
readEnvironment(ReadEnvironmentTest) Time elapsed: 0.008 sec <<< ERROR!
java.lang.NullPointerException
at ReadEnvironmentTest.readEnvironment(ReadEnvironmentTest.java:23)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.apache.maven.surefire.junit4.JUnit4Provider.execute(JUnit4Provider.java:252)
at org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:141)
at org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:112)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.apache.maven.surefire.util.ReflectionUtils.invokeMethodWithArray(ReflectionUtils.java:189)
at org.apache.maven.surefire.booter.ProviderFactory$ProviderProxy.invoke(ProviderFactory.java:165)
at org.apache.maven.surefire.booter.ProviderFactory.invokeProvider(ProviderFactory.java:85)
at org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:115)
at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:75)``
線23(其中發生了錯誤)是下一行:
final InputStream inputStream = String.class.getClassLoader().getResourceAsStream("environment.properties");
我曾嘗試使用上述的靜態方法,但如預期,它返回null
。如上所述,我正在Mac上開發,但測試應該在CentOS上運行。
摘要
我不能讀取性能在測試中,其運行在服務器的應用程序應該是在一個目錄下的文件。我的意思是,我無法讀取位於JRE路徑中的資源(jre/lib/ext
)。
我很樂意提供更多的信息,並將不勝感激任何幫助。