从 Java 启动的进程Runtime.getRuntime().exec权限较少
我在 JavaDocs 中没有看到对此的描述以及如何管理它。
如何保证启动的进程具有相同的环境和权限？
更多细节：
编写轻量级 Eclipse 插件maven https://github.com/Nodeclipse/nodeclipse-1/tree/master/org.nodeclipse.enide.maven and gradle https://github.com/Nodeclipse/nodeclipse-1/tree/master/org.nodeclipse.enide.gradle。 （这个问题经测试不是Eclipse相关见最后。）
我正在启动mvn and gradle从 Eclipse 插件中：
对于 gradlegralde build无法创建临时文件：
Eclipse 插件开发 - Gradle 无法从 Eclipse 启动器运行：java.io.IOException：访问被拒绝 https://stackoverflow.com/questions/21260657/eclipse-plugin-development-gradle-fails-to-run-from-eclipse-launcher-java-io
对于行家来说D:\Progs\springsource\apache-maven-3.0.4\bin\mvn.bat -X compile exec:java -Dexec.mainClass=runclass.Runme
Apache Maven 3.0.4 (r1232337; 2012-01-17 16:44:56+0800)
Maven home: D:\Progs\springsource\apache-maven-3.0.4
Java version: 1.7.0_11, vendor: Oracle Corporation
Java home: C:\Program Files\Java\jdk1.7.0_11\jre
Default locale: zh_CN, platform encoding: GBK
OS name: "windows 7", version: "6.1", arch: "amd64", family: "windows"
[INFO] Error stacktraces are turned on.
[DEBUG] Reading global settings from D:\Progs\springsource\apache-maven-3.0.4\conf\settings.xml
[DEBUG] Reading user settings from C:\Users\weibl\.m2\settings.xml
[DEBUG] Using local repository at C:\Users\weibl\.m2\repository
[DEBUG] Using manager EnhancedLocalRepositoryManager with priority 10 for C:\Users\weibl\.m2\repository
[INFO] Scanning for projects...
[DEBUG] Extension realms for project maven-example:maven-example:jar:0.0.1-SNAPSHOT: (none)
[DEBUG] Looking up lifecyle mappings for packaging jar from ClassRealm[plexus.core, parent: null]
[DEBUG] Resolving plugin prefix compile exec from [org.apache.maven.plugins, org.codehaus.mojo]
[DEBUG] Could not find metadata org.apache.maven.plugins/maven-metadata.xml in local (C:\Users\weibl\.m2\repository)
上面的行与相同的启动不同cmd外壳在哪里[DEBUG] Resolved plugin prefix exec to org.codehaus.mojo:exec-maven-plugin from repository central。尽管所有必需的 jar 和元数据都已下载，但每次都是相同的。
日志继续：
[DEBUG] Skipped remote update check for org.apache.maven.plugins/maven-metadata.xml, locally cached metadata up-to-date.
[DEBUG] Could not find metadata org.codehaus.mojo/maven-metadata.xml in local (C:\Users\weibl\.m2\repository)
[DEBUG] Skipped remote update check for org.codehaus.mojo/maven-metadata.xml, locally cached metadata up-to-date.
[DEBUG] Could not find metadata org.apache.maven.plugins/maven-metadata.xml in local (C:\Users\weibl\.m2\repository)
[DEBUG] Could not find metadata org.codehaus.mojo/maven-metadata.xml in local (C:\Users\weibl\.m2\repository)
[DEBUG] Using connector WagonRepositoryConnector with priority 0 for http://repo.maven.apache.org/maven2
[DEBUG] Using connector WagonRepositoryConnector with priority 0 for http://repo.maven.apache.org/maven2
Downloading: http://repo.maven.apache.org/maven2/org/codehaus/mojo/maven-metadata.xml
Downloading: http://repo.maven.apache.org/maven2/org/apache/maven/plugins/maven-metadata.xml
3/13 KB
7/13 KB
10/13 KB
3/22 KB 10/13 KB
7/22 KB 10/13 KB
11/22 KB 10/13 KB
11/22 KB 12/13 KB
15/22 KB 12/13 KB
19/22 KB 12/13 KB
22/22 KB 12/13 KB
Downloaded: http://repo.maven.apache.org/maven2/org/codehaus/mojo/maven-metadata.xml (22 KB at 15.0 KB/sec)
[DEBUG] Writing resolution tracking file C:\Users\weibl\.m2\repository\org\codehaus\mojo\resolver-status.properties
13/13 KB
Downloaded: http://repo.maven.apache.org/maven2/org/apache/maven/plugins/maven-metadata.xml (13 KB at 6.1 KB/sec)
[DEBUG] Writing resolution tracking file C:\Users\weibl\.m2\repository\org\apache\maven\plugins\resolver-status.properties
在此行之后可能会出现写入异常，因为每次都会进行下载。
Maven 报告更高级别的错误，它无法获取所需的工件compile exec,
虽然（再说一遍）它们已经在本地 Maven 仓库中：
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 2.655s
[INFO] Finished at: Sun Jan 26 13:51:56 CST 2014
[INFO] Final Memory: 8M/152M
[INFO] ------------------------------------------------------------------------
[ERROR] No plugin found for prefix ' compile exec' in the current project and in the plugin groups [org.apache.maven.plugins, org.codehaus.mojo] available from the repositories [local (C:\Users\weibl\.m2\repository), central (http://repo.maven.apache.org/maven2)] -> [Help 1]
org.apache.maven.plugin.prefix.NoPluginFoundForPrefixException: No plugin found for prefix ' compile exec' in the current project and in the plugin groups [org.apache.maven.plugins, org.codehaus.mojo] available from the repositories [local (C:\Users\weibl\.m2\repository), central (http://repo.maven.apache.org/maven2)]
at org.apache.maven.plugin.prefix.internal.DefaultPluginPrefixResolver.resolve(DefaultPluginPrefixResolver.java:94)
at org.apache.maven.lifecycle.internal.MojoDescriptorCreator.findPluginForPrefix(MojoDescriptorCreator.java:262)
at org.apache.maven.lifecycle.internal.MojoDescriptorCreator.getMojoDescriptor(MojoDescriptorCreator.java:222)
at org.apache.maven.lifecycle.internal.DefaultLifecycleTaskSegmentCalculator.calculateTaskSegments(DefaultLifecycleTaskSegmentCalculator.java:106)
at org.apache.maven.lifecycle.internal.DefaultLifecycleTaskSegmentCalculator.calculateTaskSegments(DefaultLifecycleTaskSegmentCalculator.java:86)
at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:98)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:320)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:156)
at org.apache.maven.cli.MavenCli.execute(MavenCli.java:537)
at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:196)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:141)
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:601)
at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:290)
at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:230)
at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:409)
at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:352)
[ERROR]
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/NoPluginFoundForPrefixException
更新：确保它与 Eclipse 无关。以下 Java 代码会产生与上面类似的日志输出
import java.util.*;
import java.io.*;
// http://www.javaworld.com/article/2071275/core-java/when-runtime-exec---won-t.html
public class MediocreExecJavac {
private static void log(String message) {
System.out.println(message);
}
public static void main(String args[]) {
try {
String mavenPath = "D:\\Progs\\springsource\\apache-maven-3.0.4\\bin\\mvn.bat";
String mavenOptions = "-X compile exec:java -Dexec.mainClass=runclass.Runme";
String[] cmdLine = new String[2];
cmdLine[0] = mavenPath; //cmdLine.add(mavenPath);
cmdLine[1] = mavenOptions; //cmdLine.add(mavenOptions+" compile exec:java -Dexec.mainClass="+packageClass);
String[] envp = new String[2];
//Map<String, String> envm = new HashMap<String, String>();
envp[0] = "JAVA_HOME=" + System.getProperty("java.home"); //System.getenv("JAVA_HOME");
envp[1] = "M2_HOME=" + System.getenv("MAVEN_HOME");
File workingDirectory = null;
String currentDir = new File(".").getAbsolutePath();
log(currentDir);
String userDir = System.getProperty("user.dir"); //User working directory ; "user.home" User home directory
workingDirectory = new File(userDir);
log(workingDirectory.toString());
//
Runtime rt = Runtime.getRuntime();
Process proc = rt.exec(cmdLine, envp, workingDirectory);
InputStream stdout = proc.getInputStream();
InputStream stderr = proc.getErrorStream();
InputStreamReader isr = new InputStreamReader(stdout);
InputStreamReader isr2 = new InputStreamReader(stderr);
BufferedReader br = new BufferedReader(isr);
BufferedReader br2 = new BufferedReader(isr2);
String line = null;
System.out.println("<OutputStream>");
while ((line = br.readLine()) != null)
System.out.println(line);
System.out.println("</OutputStream>");
System.out.println("<ErrorStream>");
while ((line = br2.readLine()) != null)
System.out.println(line);
System.out.println("</ErrorStream>");
int exitVal = proc.waitFor();
System.out.println("Process exitValue: " + exitVal);
} catch (Throwable t) {
t.printStackTrace();
}
}
}
Output:
...
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/NoPluginFoundForPrefixException
</OutputStream>
<ErrorStream>
'cmd' �����ڲ����ⲿ���Ҳ���ǿ����еij���
�������ļ���
</ErrorStream>
Process exitValue: 1
