Example usage for java.util.spi ToolProvider findFirst

Introduction

In this page you can find the example usage for java.util.spi ToolProvider findFirst.

Prototype

static Optional<ToolProvider> findFirst(String name) 

Source Link

Document

Returns the first instance of a ToolProvider with the given name, as loaded by ServiceLoader using the system class loader.

Usage

From source file:platform.tooling.support.Runner.java

private Result installRemoteTool(Result result) {
    // download/*from w w w . ja v  a2 s  .c  o  m*/
    var version = request.getVersion();
    var toolArchive = tool.computeArchive(version);
    var toolUri = tool.computeUri(version);
    var toolArchivePath = toolPath.resolve(toolArchive);
    if (Files.notExists(toolArchivePath)) {
        var timeout = (int) TimeUnit.MILLISECONDS.convert(9, TimeUnit.SECONDS);
        try {
            FileUtils.copyURLToFile(toolUri.toURL(), toolArchivePath.toFile(), timeout, timeout);
        } catch (IOException e) {
            throw new UncheckedIOException("Loading tool failed: " + toolUri, e);
        }
    }

    // extract
    var jarTool = ToolProvider.findFirst("jar").orElseThrow();
    var stringWriter = new StringWriter();
    var printWriter = new PrintWriter(stringWriter);
    jarTool.run(printWriter, printWriter, "--list", "--file", toolArchivePath.toString());
    var toolFolderName = stringWriter.toString().split("\\R")[0];
    var toolFolderPath = toolPath.resolve(toolFolderName);
    if (Files.notExists(toolFolderPath)) {
        try {
            jarTool.run(System.out, System.err, "--extract", "--file", toolArchivePath.toString());
            FileUtils.moveDirectoryToDirectory(Paths.get(toolFolderName).toFile(), toolPath.toFile(), true);
        } catch (IOException e) {
            throw new UncheckedIOException("Extracting tool failed: " + toolUri, e);
        }
    }
    result.toolHome = toolFolderPath.normalize().toAbsolutePath();

    // compute program entry point
    var executable = toolFolderPath.resolve(tool.computeExecutablePath());
    if (FileSystems.getDefault().supportedFileAttributeViews().contains("posix")) {
        executable.toFile().setExecutable(true);
    }
    result.toolExecutable = executable;
    return result;
}

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From source file:platform.tooling.support.Runner.java

private Result runJdkFoundationTool(Result result) throws Exception {
    var toolProvider = ToolProvider.findFirst(tool.getExecutable()).orElseThrow();
    var args = request.getArguments().toArray(new String[0]);
    try (var out = new PrintStream(Files.newOutputStream(result.out)); //
            var err = new PrintStream(Files.newOutputStream(result.err))) {
        result.status = toolProvider.run(out, err, args);
    }//from   ww  w . j a v a  2  s  .c  om
    return result;
}

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