Streamgobbler Java Example | Java 8 Tutorial 16 (Streams) – Groupingby, Partitioningby, Counting, \U0026 Mapping Collectors Methods 113 개의 자세한 답변

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d여기에서 Java 8 tutorial 16 (Streams) – groupingBy, partitioningBy, counting, \u0026 mapping Collectors methods – streamgobbler java example 주제에 대한 세부정보를 참조하세요

03:10 What is the collect method on the Stream interface?
03:25 What is the static partitioningBy method on the Collectors interface?
03:45 What is the static groupingBy method on the Collectors interface?
04:00 What is the difference between the groupingBy and partitioningBy Collectors interface methods?
06:00 What is the static counting method on the Collectors interface?
08:30 What is the advantage of using the groupingBy over using the partitioningBy Collectors interface method?
10:00 What is the static mapping method on the Collectors interface?
12:00 What is the static toList method on the Collectors interface?
12:40 What is the advantage of using the groupingBy over the partitioningBy Collectors interface methods?
13:40 How to use static methods on a Java class without specifying the class name?
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Java StreamGobbler Examples

Java StreamGobbler – 29 examples found. These are the top rated real world Java examples of StreamGobbler extracted from open source projects.

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Source: java.hotexamples.com

Date Published: 12/1/2021

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edu.stanford.nlp.util.StreamGobbler java code examples

Best Java code snippets using edu.stanford.nlp.util.StreamGobbler (Showing top 20 results out of 315) · IOUtils. · BZip2PipedOutputStream. · StreamGobbler.

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Source: www.tabnine.com

Date Published: 11/5/2021

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Handle Input using StreamGobbler – java – Stack Overflow

I do not find any scenario wherein StreamGobbler is used to handle inputs. For example, in mailx , I have to specify the body of the email, …

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Date Published: 10/22/2021

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Java Code Examples for ch.ethz.ssh2.StreamGobbler

This page shows Java code examples of ch.ethz.ssh2. … while exec command”, e); throw e; } InputStream stdout = new StreamGobbler(getSession().

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Source: www.programcreek.com

Date Published: 5/28/2022

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ch.ethz.ssh2.StreamGobbler – Java Code Examples and tutorials

Examples with StreamGobbler used on opensource projects ch.ethz.ssh2. … Example 1 with StreamGobbler … StreamGobbler) InputStreamReader(java.io.

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Source: useof.org

Date Published: 12/6/2021

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How to Run a Shell Command in Java – Baeldung

Quick gue to how to two ways of running a shell command in Java, … Let’s implement a commonly used called StreamGobbler which …

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Date Published: 8/18/2022

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Java Code Examples of ch.ethz.ssh2.StreamGobbler

This page proves Java code examples for ch.ethz.ssh2.StreamGobbler. The examples are extracted from open source Java projects from GitHub.

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CommandRunner.StreamGobbler (PetitPoucet Documentation)

examples.util.CommandRunner.StreamGobbler … StreamGobbler extends java.lang.Thread … Nested es/interfaces inherited from java.lang.Thread.

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Date Published: 9/23/2022

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주제와 관련된 이미지 streamgobbler java example

주제와 관련된 더 많은 사진을 참조하십시오 Java 8 tutorial 16 (Streams) – groupingBy, partitioningBy, counting, \u0026 mapping Collectors methods. 댓글에서 더 많은 관련 이미지를 보거나 필요한 경우 더 많은 관련 기사를 볼 수 있습니다.

Java 8 tutorial 16 (Streams) - groupingBy, partitioningBy, counting, \u0026 mapping Collectors methods
Java 8 tutorial 16 (Streams) – groupingBy, partitioningBy, counting, \u0026 mapping Collectors methods

주제에 대한 기사 평가 streamgobbler java example

  • Author: Prototype Project
  • Views: 조회수 31,941회
  • Likes: 좋아요 321개
  • Date Published: 2014. 7. 7.
  • Video Url link: https://www.youtube.com/watch?v=CaERsnos5p4

Java StreamGobbler Examples, StreamGobbler Java Examples

public String runCmd(String command, String[] parms) throws ServiceException { String result = “”; try { String osName = System.getProperty(“os.name”); LOG.debug(“OS name: ” + osName); String[] cmd; int nextParm; if (osName.equals(“Windows NT”) || osName.equals(“Windows XP”)) { cmd = new String[3 + parms.length]; cmd[0] = “cmd.exe”; cmd[1] = “/C”; nextParm = 2; } else if (osName.equals(“Windows 95”)) { cmd = new String[3 + parms.length]; cmd[0] = “command.com”; cmd[1] = “/C”; nextParm = 2; } else // Assuming that else is unix or unix-like in this regard of not needing an explicit // shell program. { cmd = new String[1 + parms.length]; nextParm = 0; } // Example values to use for ‘command’ here: // If using cygwin on a Windows OS: // “c:\\cygwin\\bin\\telnet.exe 192.168.1.101” // “c:\\cygwin\\bin\\expect.exe /tmp/telnettojbdesktop.exp” // If using a Unix (I’m guessing here): // “telnet 192.168.1.101” // “expect /tmp/telnettojbdesktop.exp” cmd[nextParm++] = command; for (String p : parms) { cmd[nextParm++] = p; } if (LOG.isDebugEnabled()) { StringBuffer buffer = new StringBuffer(); for (String a : cmd) { buffer.append(a).append(” “); } LOG.debug(“Executing ” + buffer.toString()); } Runtime rt = Runtime.getRuntime(); Process proc = rt.exec(cmd); StreamGobbler errorGobbler = new StreamGobbler(proc.getErrorStream(), “ERROR”); StreamGobbler outputGobbler = new StreamGobbler(proc.getInputStream(), “OUTPUT”); errorGobbler.start(); outputGobbler.start(); // This is the stream used to pass INPUT to the process. (It’s called the “output stream” // because // it’s an *output* stream from the perspective of this class.) OutputStream outputStream = proc.getOutputStream(); int exitVal = proc.waitFor(); if (exitVal != 0) { LOG.error(“Exit value from ” + cmd[2] + “: ” + exitVal); } String stdErr = errorGobbler.getBuffer(); if (stdErr.length() > 0) { result = stdErr; } String stdOut = outputGobbler.getBuffer(); if (stdOut.length() > 0) { // It’s intentional that stdOut replaces what was in stdErr if there *is* anything in // stdOut. result = stdOut; } } catch (Throwable t) { throw new ServiceException(ServiceError.RUNTIME_ERROR, t); } return result; }

edu.stanford.nlp.util.StreamGobbler java code examples

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Handle Input using StreamGobbler

I have been through the StreamGobbler at the following URL

JavaWorld : Stream Gobbler

I understand the usage and the reason on why it has been implemented. However the scenarios covered are only those wherein there could be an output from the command / handling error’s.

I do not find any scenario wherein StreamGobbler is used to handle inputs. For example, in mailx , I have to specify the body of the email, which I have done in the following format

Process proc = Runtime.getRuntime().exec(cmd); OutputStreamWriter osw = new OutputStreamWriter(proc.getOutputStream()); osw.write(mailBody); osw.close();

How can this be handled through StreamGobbler , or it is not required to be handled through it.

ch.ethz.ssh2.StreamGobbler Java Exaples

ch.ethz.ssh2.StreamGobbler Java Examples

The following examples show how to use ch.ethz.ssh2.StreamGobbler . You can vote up the ones you like or vote down the ones you don’t like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.

Example #1

Source Project: wecube-platform Author: WeBankPartners File: PooledRemoteCommandExecutor.java License: Apache License 2.0 6 votes @Override public String call() throws Exception { try { String shellCmd = “sh -l -c ‘” + cmd.getCommand() + “‘”; getSession().execCommand(shellCmd); getSession().waitForCondition(ChannelCondition.TIMEOUT, 1000L * 60 * 5); } catch (Exception e) { LOGGER.error(“errors while exec command”, e); throw e; } InputStream stdout = new StreamGobbler(getSession().getStdout()); @SuppressWarnings(“resource”) BufferedReader br = new BufferedReader(new InputStreamReader(stdout)); StringBuilder result = new StringBuilder(); String line = null; while ((line = br.readLine()) != null) { result.append(line); } if (getSession().getExitStatus() != null && getSession().getExitStatus() != 0) { throw new Exception(“exec failed with code ” + getSession().getExitStatus()); } return result.toString(); }

Example #2

Source Project: dk-fitting Author: dkhadoop File: SshUtil.java License: Apache License 2.0 6 votes public static String exe(String cmd, String hostIp, String hostName, String hostPassword) throws Exception { Connection conn = createConn(hostIp, hostName, hostPassword); Session sess = conn.openSession(); sess.requestPTY(“vt100”, 80, 24, 640, 480, null); sess.execCommand(cmd); InputStream stdout = new StreamGobbler(sess.getStdout()); StringBuilder sb = new StringBuilder(); BufferedReader stdoutReader = new BufferedReader( new InputStreamReader(stdout)); System.out.println(“Here is the output from stdout:”); while (true) { String line = stdoutReader.readLine(); if (line == null) break; System.out.println(line); sb.append(line + ”

“); } // System.out.println(“ExitCode: ” + sess.getExitStatus()); // System.out.println(“sb.toString() = ” + sb.toString()); sess.close(); conn.close(); return sb.toString(); }

Example #3

Source Project: bestconf Author: zhuyuqing File: SUTTest.java License: Apache License 2.0 6 votes @Override public void startTest(){ Session session=null; try { getConnection(); if(connection==null) throw new IOException(“Unable to connect the server!”); session = connection.openSession(); session.execCommand(shellofstartTest); System.out.println(“Here is some information about the remote host:”); InputStream stderr = new StreamGobbler(session.getStderr()); BufferedReader br = new BufferedReader(new InputStreamReader(stderr)); InputStream stdout = new StreamGobbler(session.getStdout()); BufferedReader stdbr = new BufferedReader(new InputStreamReader(stdout)); System.out.println(“Test had been started successfully!”); } catch (IOException e) { e.printStackTrace(); System.exit(-1); }finally{ if(session != null) session.close(); closeConnection(); } }

Example #4

Source Project: dk-fitting Author: dkhadoop File: SshUtil.java License: Apache License 2.0 5 votes public static String getHomePath(String cmd, String hostIp, String hostName, String hostPassword, String hadoopName) throws Exception { Connection conn = createConn(hostIp, hostName, hostPassword); Session sess = conn.openSession(); sess.requestPTY(“vt100”, 80, 24, 640, 480, null); sess.execCommand(cmd); InputStream stdout = new StreamGobbler(sess.getStdout()); StringBuilder sb = new StringBuilder(); BufferedReader stdoutReader = new BufferedReader(new InputStreamReader(stdout)); // System.out.println(“Here is the output from stdout:”); String hadoopNamePath = “”; while (true) { String line = stdoutReader.readLine(); // System.out.println( trim); if (line != null && line.trim().startsWith(“export ” + hadoopName)) { String substring = line.substring(line.lastIndexOf(“=”) + 1); hadoopNamePath = substring; } if (line == null) break; } //System.out.println(“ExitCode: ” + sess.getExitStatus()); // System.out.println(“sb.toString() = ” + sb.toString()); sess.close(); conn.close(); return hadoopNamePath; }

Example #5

Source Project: fastdfs-zyc Author: canmind File: Tools.java License: GNU General Public License v2.0 5 votes public static List exeRemoteConsole(String hostname, String username, String password, String cmd) { List result = new ArrayList(); //指明连接主机的IP地址 Connection conn = new Connection(hostname); Session ssh = null; try { //连接到主机 conn.connect(); //使用用户名和密码校验 boolean isconn = conn.authenticateWithPassword(username, password); if (!isconn) { logger.error(“用户名称或者是密码不正确”); } else { logger.info(“已经连接OK”); ssh = conn.openSession(); //使用多个命令用分号隔开 // ssh.execCommand(“pwd;cd /tmp;mkdir shb;ls;ps -ef|grep weblogic”); ssh.execCommand(cmd); //只允许使用一行命令,即ssh对象只能使用一次execCommand这个方法,多次使用则会出现异常 // ssh.execCommand(“mkdir hb”); //将屏幕上的文字全部打印出来 InputStream is = new StreamGobbler(ssh.getStdout()); BufferedReader brs = new BufferedReader(new InputStreamReader(is)); for (String line = brs.readLine(); line != null; line = brs.readLine()) { result.add(line); } } //连接的Session和Connection对象都需要关闭 if (ssh != null) { ssh.close(); } conn.close(); } catch (IOException e) { logger.error(“”, e); } return result; }

Example #6

Source Project: newblog Author: Zephery File: MysqlUtil.java License: Apache License 2.0 4 votes /** * export database; */ public void exportDataBase() { logger.info(“start backup database”); String username = Config.getProperty(“jdbc.username_dev”); String password = Config.getProperty(“jdbc.password_dev”); String database = Config.getProperty(“jdbc.database”); String host = Config.getProperty(“jdbc.host_dev”); String os = System.getProperty(“os.name”); String file_path = null; // if (os.toLowerCase().startsWith(“win”)) { //根据系统类型 // file_path = System.getProperty(“user.dir”) + “\\sql\\”; // } else { // file_path = System.getProperty(“user.dir”) + “/sql/”;//保存的路径 // } file_path = System.getProperty(“myblog.path”) + “sql”; String file_name = “/myblog” + DateTime.now().toString(“yyyyMMddHHmmss”) + “.sql”; String file = file_path + file_name; logger.info(“file_path and file_name: ” + file); //server String s_host = Config.getProperty(“server.host”); Integer s_port = Config.getIntProperty(“server.port”); String s_username = Config.getProperty(“server.username”); String s_password = Config.getProperty(“server.password”); try { StringBuffer sb = new StringBuffer(); sb.append(Common.MYSQL_DUMP).append(” -u “).append(username).append(” -p”).append(password).append(” -h “).append(host).append(” “).append(database).append(” >”).append(file); String sql = sb.toString(); logger.info(sql); //connect to server Connection connection = new Connection(s_host, s_port); connection.connect(); boolean isAuth = connection.authenticateWithPassword(s_username, s_password); if (!isAuth) { logger.error(“server login error”); } Session session = connection.openSession(); session.execCommand(sql); InputStream stdout = new StreamGobbler(session.getStdout()); BufferedReader br = new BufferedReader(new InputStreamReader(stdout)); while (true) { String line = br.readLine(); if (line == null) break; System.out.println(line); } session.close(); connection.close(); stdout.close(); br.close(); logger.info(“backup finish”); logger.info(sb.toString()); } catch (Exception e) { logger.error(“error”, e); } }

Example #7

Examples with StreamGobbler

public static void main(String[] args) { String hostname = “my-ssh-server”; String username = “joe”; String password = “joespass”; String proxyHost = “192.168.1.1”; // default port used by squid int proxyPort = 3128; try { /* Create a connection instance */ Connection conn = new Connection(hostname); /* We want to connect through a HTTP proxy */ conn.setProxyData(new HTTPProxyData(proxyHost, proxyPort)); // if the proxy requires basic authentication: // conn.setProxyData(new HTTPProxyData(proxyHost, proxyPort, “username”, “secret”)); /* Now connect (through the proxy) */ conn.connect(); /* Authenticate. * If you get an IOException saying something like * “Authentication method password not supported by the server at this stage.” * then please check the FAQ. */ boolean isAuthenticated = conn.authenticateWithPassword(username, password); if (isAuthenticated == false) throw new IOException(“Authentication failed.”); /* Create a session */ Session sess = conn.openSession(); sess.execCommand(“uname -a && date && uptime && who”); System.out.println(“Here is some information about the remote host:”); /* * This basic example does not handle stderr, which is sometimes dangerous * (please read the FAQ). */ InputStream stdout = new StreamGobbler (sess.getStdout()); BufferedReader br = new BufferedReader(new InputStreamReader(stdout)); while (true) { String line = br.readLine(); if (line == null) break; System.out.println(line); } /* Show exit status, if available (otherwise “null”) */ System.out.println(“ExitCode: ” + sess.getExitStatus()); /* Close this session */ sess.close(); /* Close the connection */ conn.close(); } catch (IOException e) { e.printStackTrace(System.err); System.exit(2); } }

How to Run a Shell Command in Java

1. Overview

With this tutorial we’ll illustrate the two ways of executing a shell command from within Java code.

The first is to use the Runtime class and call its exec method.

The second and more customizable way, will be to create and use a ProcessBuilder instance.

2. Operating System Dependency

Before we’re going to create a new Process executing our shell command, we need to first determine the operating system on which our JVM is running.

That’s because, on Windows, we need to run our command as argument to the cmd.exe shell and on all other operating systems we can issue a standard shell, called sh:

boolean isWindows = System.getProperty(“os.name”) .toLowerCase().startsWith(“windows”);

3. Input and Output

Furthermore we need a way to hook into the input and output streams of our process.

At least the output must be consumed – otherwise our process doesn’t return successfully, instead it will hang.

Let’s implement a commonly used class called StreamGobbler which consumes an InputStream:

private static class StreamGobbler implements Runnable { private InputStream inputStream; private Consumer consumer; public StreamGobbler(InputStream inputStream, Consumer consumer) { this.inputStream = inputStream; this.consumer = consumer; } @Override public void run() { new BufferedReader(new InputStreamReader(inputStream)).lines() .forEach(consumer); } }

NOTE: This class is implementing the Runnable interface, which means that it could be executed by any Executor.

4. Runtime.exec()

A method-call to Runtime.exec() is a simple, not yet customizable, way to spawn a new sub-process.

In the following example we will request a directory-listing of a users home-directory and printing it to the console:

String homeDirectory = System.getProperty(“user.home”); Process process; if (isWindows) { process = Runtime.getRuntime() .exec(String.format(“cmd.exe /c dir %s”, homeDirectory)); } else { process = Runtime.getRuntime() .exec(String.format(“sh -c ls %s”, homeDirectory)); } StreamGobbler streamGobbler = new StreamGobbler(process.getInputStream(), System.out::println); Executors.newSingleThreadExecutor().submit(streamGobbler); int exitCode = process.waitFor(); assert exitCode == 0;

5. ProcessBuilder

For the second implementation of our computing problem, we’ll be using a ProcessBuilder. This is preferred over the Runtime approach because we’re able to customize some details.

For example we’re able to:

change the working directory our shell command is running in using builder.directory()

set-up a custom key-value map as environment using builder.environment()

redirect input and output streams to custom replacements

inherit both of them to the streams of the current JVM process using builder.inheritIO()

ProcessBuilder builder = new ProcessBuilder(); if (isWindows) { builder.command(“cmd.exe”, “/c”, “dir”); } else { builder.command(“sh”, “-c”, “ls”); } builder.directory(new File(System.getProperty(“user.home”))); Process process = builder.start(); StreamGobbler streamGobbler = new StreamGobbler(process.getInputStream(), System.out::println); Executors.newSingleThreadExecutor().submit(streamGobbler); int exitCode = process.waitFor(); assert exitCode == 0;

6. Conclusion

As we’ve seen in this quick tutorial, we can execute a shell command in Java in two distinct ways.

Generally, if you’re planning to customize the execution of the spawned process, for example, to change its working directory, you should consider using a ProcessBuilder.

As always, you’ll find the sources on GitHub.

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Java Code Examples of ch.ethz.ssh2.StreamGobbler

Java Code Examples for ch.ethz.ssh2.StreamGobbler

The following code examples are extracted from open source projects. You can click to vote up the examples that are useful to you.

Example 1 From project gansenbang, under directory /s4-managerV2/src/io/s4/manager/util/. Source file: SSHWrapper.java 25 public Map RunRemoteCommand(String command) throws IOException { Session sess=conn.openSession(); sess.execCommand(command); Map execret=new HashMap(); InputStream stdout=new StreamGobbler(sess.getStdout()); processOutStream(stdout,execret,charset); InputStream stderr=new StreamGobbler(sess.getStderr()); processErrStream(stderr,execret,charset); sess.waitForCondition(ChannelCondition.EXIT_STATUS,TIME_OUT); Integer ret=sess.getExitStatus(); sess.close(); execret.put(“result”,ret.toString()); return execret; }

Example 2 From project gmc, under directory /src/org.gluster.storage.management.gateway/src/org/gluster/storage/management/gateway/utils/. Source file: SshUtil.java 23 private ProcessResult executeCommand(Connection sshConnection,String command){ Session session=null; try { session=sshConnection.openSession(); BufferedReader stdoutReader=new BufferedReader(new InputStreamReader(new StreamGobbler(session.getStdout()))); BufferedReader stderrReader=new BufferedReader(new InputStreamReader(new StreamGobbler(session.getStderr()))); session.execCommand(command); ProcessResult result=getResultOfExecution(session,stdoutReader,stderrReader); return result; } catch ( Exception e) { String errMsg=”Exception while executing command [” + command + “] on [“+ sshConnection.getHostname()+ “]”; logger.error(errMsg,e); sshConnCache.remove(sshConnection.getHostname()); sshConnection.close(); if (e instanceof IllegalStateException || e instanceof IOException) { throw new ConnectionException(“Couldn’t open SSH session on [” + sshConnection.getHostname() + “]!”,e); } else { throw new GlusterRuntimeException(errMsg,e); } } finally { if (session != null) { session.close(); } } }

키워드에 대한 정보 streamgobbler java example

다음은 Bing에서 streamgobbler java example 주제에 대한 검색 결과입니다. 필요한 경우 더 읽을 수 있습니다.

이 기사는 인터넷의 다양한 출처에서 편집되었습니다. 이 기사가 유용했기를 바랍니다. 이 기사가 유용하다고 생각되면 공유하십시오. 매우 감사합니다!

사람들이 주제에 대해 자주 검색하는 키워드 Java 8 tutorial 16 (Streams) – groupingBy, partitioningBy, counting, \u0026 mapping Collectors methods

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