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added help command to list all available commands

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maocorte 2016-01-19 09:57:26 +01:00
parent e5465a5a0e
commit 12fbf038b5
1 changed files with 69 additions and 2 deletions
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71
tachyon/src/main/java/org/apache/zeppelin/tachyon/TachyonInterpreter.java
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@ -113,15 +113,20 @@ public class TachyonInterpreter extends Interpreter {
System.setOut(ps);
for (String command : commands) {
int commandResuld = 1;
String[] args = splitAndRemoveEmpty(command, " ");
int commandResuld = tfs.run(args);
System.out.println();
if (args.length > 0 && args[0].equals("help")) {
System.out.println(getCommandList());
} else {
commandResuld = tfs.run(args);
}
if (commandResuld != 0) {
isSuccess = false;
break;
} else {
completedCommands += 1;
}
System.out.println();
}
System.out.flush();
@ -178,4 +183,66 @@ public class TachyonInterpreter extends Interpreter {
}
return voices;
}
private String getCommandList() {
StringBuilder sb = new StringBuilder();
sb.append("Commands list:");
sb.append("\n\t[help] - List all available commands.");
sb.append("\n\t[cat <path>] - Print the content of the file to the console.");
sb.append("\n\t[copyFromLocal <src> <remoteDst>] - Copy the specified file specified " +
"by \"source path\" to the path specified by \"remote path\". " +
"This command will fail if \"remote path\" already exists.");
sb.append("\n\t[copyToLocal <src> <localDst>] - Copy the specified file from the path " +
"specified by \"remote source\" to a local destination.");
sb.append("\n\t[count <path>] - Display the number of folders and files matching " +
"the specified prefix in \"path\".");
sb.append("\n\t[du <path>] - Display the size of a file or a directory specified " +
"by the input path.");
sb.append("\n\t[fileinfo <path>] - Print the information of the blocks of a specified file.");
sb.append("\n\t[free <file path|folder path>] - Free a file or all files under a " +
"directory from Tachyon. If the file/directory is also in under storage, " +
"it will still be available there.");
sb.append("\n\t[getUsedBytes] - Get number of bytes used in the TachyonFS.");
sb.append("\n\t[getCapacityBytes] - Get the capacity of the TachyonFS.");
sb.append("\n\t[load <path>] - Load the data of a file or a directory from under " +
"storage into Tachyon.");
sb.append("\n\t[loadMetadata <path>] - Load the metadata of a file or a directory " +
"from under storage into Tachyon.");
sb.append("\n\t[location <path>] - Display a list of hosts that have the file data.");
sb.append("\n\t[ls <path>] - List all the files and directories directly under the " +
"given path with information such as size.");
sb.append("\n\t[lsr <path>] - Recursively list all the files and directories under " +
"the given path with information such as size.");
sb.append("\n\t[mkdir <path>] - Create a directory under the given path, along with " +
"any necessary parent directories. This command will fail if the given " +
"path already exists.");
sb.append("\n\t[mount <tachyonPath> <ufsURI>] - Mount the underlying file system " +
"path \"uri\" into the Tachyon namespace as \"path\". The \"path\" is assumed " +
"not to exist and is created by the operation. No data or metadata is loaded " +
"from under storage into Tachyon. After a path is mounted, operations on objects " +
"under the mounted path are mirror to the mounted under storage.");
sb.append("\n\t[mv <src> <dst>] - Move a file or directory specified by \"source\" " +
"to a new location \"destination\". This command will fail if " +
"\"destination\" already exists.");
sb.append("\n\t[pin <path>] - Pin the given file to avoid evicting it from memory. " +
"If the given path is a directory, it recursively pins all the files contained " +
"and any new files created within this directory.");
sb.append("\n\t[report <path>] - Report to the master that a file is lost.");
sb.append("\n\t[request <tachyonaddress> <dependencyId>] - Request the file for " +
"a given dependency ID.");
sb.append("\n\t[rm <path>] - Remove a file. This command will fail if the given " +
"path is a directory rather than a file.");
sb.append("\n\t[rmr <path>] - Remove a file, or a directory with all the files and " +
"sub-directories that this directory contains.");
sb.append("\n\t[tail <path>] - Print the last 1KB of the specified file to the console.");
sb.append("\n\t[touch <path>] - Create a 0-byte file at the specified location.");
sb.append("\n\t[unmount <tachyonPath>] - Unmount the underlying file system path " +
"mounted in the Tachyon namespace as \"path\". Tachyon objects under \"path\" " +
"are removed from Tachyon, but they still exist in the previously " +
"mounted under storage.");
sb.append("\n\t[unpin <path>] - Unpin the given file to allow Tachyon to evict " +
"this file again. If the given path is a directory, it recursively unpins " +
"all files contained and any new files created within this directory.");
return sb.toString();
}
}