Example usage for org.apache.hadoop.fs FileUtil canRead

Introduction

In this page you can find the example usage for org.apache.hadoop.fs FileUtil canRead.

Prototype

public static boolean canRead(File f) 

Source Link

Document

Platform independent implementation for File#canRead()

Usage

From source file:com.mellanox.r4h.MiniDFSCluster.java

License:Apache License

/**
 * @return a debug string which can help diagnose an error of why
 *         a given directory might have a permissions error in the context
 *         of a test case//from   ww  w  .  j a v a 2  s  .c o m
 */
private String createPermissionsDiagnosisString(File path) {
    StringBuilder sb = new StringBuilder();
    while (path != null) {
        sb.append("path '" + path + "': ").append("\n");
        sb.append("\tabsolute:").append(path.getAbsolutePath()).append("\n");
        sb.append("\tpermissions: ");
        sb.append(path.isDirectory() ? "d" : "-");
        sb.append(FileUtil.canRead(path) ? "r" : "-");
        sb.append(FileUtil.canWrite(path) ? "w" : "-");
        sb.append(FileUtil.canExecute(path) ? "x" : "-");
        sb.append("\n");
        path = path.getParentFile();
    }
    return sb.toString();
}

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From source file:org.apache.slider.common.tools.SliderUtils.java

License:Apache License

/**
 * Check for any needed libraries being present. On Unix none are needed;
 * on windows they must be present//  www.j  a v a  2s.co m
 * @return true if all is well
 */
public static String checkForRequiredNativeLibraries() {

    if (!Shell.WINDOWS) {
        return "";
    }
    StringBuilder errorText = new StringBuilder("");
    if (!NativeIO.isAvailable()) {
        errorText.append("No native IO library. ");
    }
    try {
        String path = Shell.getQualifiedBinPath("winutils.exe");
        log.debug("winutils is at {}", path);
    } catch (IOException e) {
        errorText.append("No WINUTILS.EXE. ");
        log.warn("No winutils: {}", e, e);
    }
    try {
        File target = new File("target");
        FileUtil.canRead(target);
    } catch (UnsatisfiedLinkError e) {
        log.warn("Failing to link to native IO methods: {}", e, e);
        errorText.append("No native IO methods");
    }
    return errorText.toString();
}

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