Examples with Session org.apache.nifi.toolkit.cli.api.Session used on opensource projects

Example 1 with Session

use of org.apache.nifi.toolkit.cli.api.Session in project nifi by apache.

the class CLIMain method createContext.

private static Context createContext(final PrintStream output, final boolean isInteractive) {
    Session session;
    final String userHomeValue = System.getProperty("user.home");
    final File userHome = Paths.get(userHomeValue).toFile();
    if (!userHome.exists() || !userHome.canRead() || !userHome.canWrite()) {
        session = new InMemorySession();
        if (isInteractive) {
            output.println();
            output.println("Unable to create session from " + userHomeValue + ", falling back to in-memory session");
            output.println();
        }
    } else {
        final InMemorySession inMemorySession = new InMemorySession();
        final File sessionState = new File(userHome.getAbsolutePath(), SESSION_PERSISTENCE_FILE);
        try {
            if (!sessionState.exists()) {
                sessionState.createNewFile();
            }
            final PersistentSession persistentSession = new PersistentSession(sessionState, inMemorySession);
            persistentSession.loadSession();
            session = persistentSession;
            if (isInteractive) {
                output.println();
                output.println("Session loaded from " + sessionState.getAbsolutePath());
                output.println();
            }
        } catch (Exception e) {
            session = inMemorySession;
            if (isInteractive) {
                output.println();
                output.println("Unable to load session from " + sessionState.getAbsolutePath() + ", falling back to in-memory session");
                output.println();
            }
        }
    }
    final ClientFactory<NiFiClient> niFiClientFactory = new NiFiClientFactory();
    final ClientFactory<NiFiRegistryClient> nifiRegClientFactory = new NiFiRegistryClientFactory();
    return new StandardContext.Builder().output(output).session(session).nifiClientFactory(niFiClientFactory).nifiRegistryClientFactory(nifiRegClientFactory).interactive(isInteractive).build();
}

Example 2 with Session

use of org.apache.nifi.toolkit.cli.api.Session in project nifi by apache.

the class AbstractPropertyCommand method execute.

@Override
public final R execute(final CommandLine commandLine) throws CommandException {
    try {
        final Properties properties = new Properties();
        // start by loading the properties file if it was specified
        if (commandLine.hasOption(CommandOption.PROPERTIES.getLongName())) {
            final String propertiesFile = commandLine.getOptionValue(CommandOption.PROPERTIES.getLongName());
            if (!StringUtils.isBlank(propertiesFile)) {
                try (final InputStream in = new FileInputStream(propertiesFile)) {
                    properties.load(in);
                }
            }
        } else {
            // no properties file was specified so see if there is anything in the session
            final SessionVariable sessionVariable = getPropertiesSessionVariable();
            if (sessionVariable != null) {
                final Session session = getContext().getSession();
                final String sessionPropsFiles = session.get(sessionVariable.getVariableName());
                if (!StringUtils.isBlank(sessionPropsFiles)) {
                    try (final InputStream in = new FileInputStream(sessionPropsFiles)) {
                        properties.load(in);
                    }
                }
            }
        }
        // add in anything specified on command line, and override anything that was already there
        for (final Option option : commandLine.getOptions()) {
            final String optValue = option.getValue() == null ? "" : option.getValue();
            properties.setProperty(option.getLongOpt(), optValue);
        }
        // delegate to sub-classes
        return doExecute(properties);
    } catch (CommandException ce) {
        throw ce;
    } catch (Exception e) {
        throw new CommandException("Error executing command '" + getName() + "' : " + e.getMessage(), e);
    }
}

Example 3 with Session

use of org.apache.nifi.toolkit.cli.api.Session in project nifi by apache.

the class GetVariable method execute.

@Override
public StringResult execute(final CommandLine commandLine) throws CommandException {
    final String[] args = commandLine.getArgs();
    if (args == null || args.length != 1 || StringUtils.isBlank(args[0])) {
        throw new CommandException("Incorrect number of arguments, should be: <var>");
    }
    final Session session = getContext().getSession();
    try {
        final String value = session.get(args[0]);
        if (value == null) {
            return new StringResult("", getContext().isInteractive());
        } else {
            return new StringResult(value, getContext().isInteractive());
        }
    } catch (SessionException se) {
        throw new CommandException(se.getMessage(), se);
    }
}

Example 4 with Session

use of org.apache.nifi.toolkit.cli.api.Session in project nifi by apache.

the class ShowSession method execute.

@Override
public VoidResult execute(final CommandLine cli) throws CommandException {
    try {
        final Session session = getContext().getSession();
        final PrintStream printStream = getContext().getOutput();
        session.printVariables(printStream);
        return VoidResult.getInstance();
    } catch (SessionException se) {
        throw new CommandException(se.getMessage(), se);
    }
}

Example 5 with Session

use of org.apache.nifi.toolkit.cli.api.Session in project nifi by apache.

the class NiFiCLIMainRunner method main.

public static void main(String[] args) {
    final String[] cmdArgs = ("registry list-buckets help " + "").split("[ ]");
    final Session session = new InMemorySession();
    final ClientFactory<NiFiClient> niFiClientFactory = new NiFiClientFactory();
    final ClientFactory<NiFiRegistryClient> nifiRegClientFactory = new NiFiRegistryClientFactory();
    final Context context = new StandardContext.Builder().output(System.out).session(session).nifiClientFactory(niFiClientFactory).nifiRegistryClientFactory(nifiRegClientFactory).build();
    final Map<String, Command> commands = CommandFactory.createTopLevelCommands(context);
    final Map<String, CommandGroup> commandGroups = CommandFactory.createCommandGroups(context);
    final CommandProcessor processor = new CommandProcessor(commands, commandGroups, context);
    processor.process(cmdArgs);
}