org.bidib.wizard.common.script.node.FeatureGetAllCommand Maven / Gradle / Ivy

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package org.bidib.wizard.common.script.node;

import java.util.LinkedList;
import java.util.List;
import java.util.Scanner;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.ThreadFactory;
import java.util.concurrent.TimeUnit;

import org.apache.commons.collections4.CollectionUtils;
import org.bidib.jbidibc.messages.utils.ThreadFactoryBuilder;
import org.bidib.wizard.api.context.ApplicationContext;
import org.bidib.wizard.api.model.NodeInterface;
import org.bidib.wizard.api.service.console.ConsoleService;
import org.bidib.wizard.common.script.AbstractScriptCommand;
import org.bidib.wizard.common.script.DefaultScriptContext;
import org.bidib.wizard.common.script.ScriptExecutionException;
import org.bidib.wizard.common.script.ScriptUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class FeatureGetAllCommand extends AbstractScriptCommand {
    private static final Logger LOGGER = LoggerFactory.getLogger(FeatureGetAllCommand.class);

    public static final String KEY = "featureGetAll";

    public static final String HELP =
        CODE_BLOCK_START + KEY + prepareHelpHtml(" [--V:P] [--all] [--parallel=]") + DIV_END;

    private int[] vidPid;

    private boolean processAllNodes;

    private boolean processParallel;

    public FeatureGetAllCommand(final ConsoleService consoleService) {
        super(consoleService, KEY, HELP);
    }

    @Override
    public void parse(String commandLine) {
        try (Scanner scanner = new Scanner(commandLine)) {
            if (!getKey().equals(scanner.next())) {
                LOGGER.info("Invalid command is scanned, key does not match.");
                throw new IllegalArgumentException("Invalid command is scanned, key does not match.");
            }

            line = commandLine.trim();

            String arguments = line.substring(KEY.length() + 1);

            try {
                vidPid = ScriptUtils.scanVidPid(scanner, true);
                if (vidPid != null) {
                    LOGGER.info("Current vidPid: {}:{}", vidPid[0], vidPid[1]);
                }
            }
            catch (IllegalArgumentException ex) {
                LOGGER.info("Parse VID/PID failed.", ex);
                throw new IllegalArgumentException("Parse VID/PID failed.\n" + getHelpHtml());
            }

            if (arguments.indexOf("--all") > -1) {
                LOGGER.info("Process all nodes is activated.");
                processAllNodes = true;
            }

            try {
                String parallel = ScriptUtils.parseStringParam("--parallel=\\w+", arguments);
                if (Boolean.parseBoolean(parallel) || "yes".equalsIgnoreCase(parallel)) {
                    LOGGER.info("Process the requests parallel.");
                    processParallel = true;
                }
            }
            catch (IllegalArgumentException ex) {
                LOGGER.info("The parallel argument is not provided.");
            }

        }

        LOGGER.info("Parsed command.");
    }

    public int[] getVidPid() {
        return vidPid;
    }

    public boolean isProcessAllNodes() {
        return processAllNodes;
    }

    @Override
    protected void internalExecute(final T scripting, final ApplicationContext context) {
        LOGGER.info("Get all features. Execute the requests parallel: {}", processParallel);

        final List nodes = new LinkedList<>();

        if (vidPid != null) {
            List currentNodes = scripting.getNodesByVidAndPid(vidPid[0], vidPid[1]);
            if (CollectionUtils.isNotEmpty(currentNodes)) {
                if (processAllNodes) {
                    nodes.addAll(currentNodes);
                }
                else {
                    nodes.add(currentNodes.get(0));
                }
            }
            else {
                addError(context, "No matching node with provided VID/PID found.");
                return;
            }
        }
        else if (processAllNodes) {
            final List currentNodes = scripting.getAllNodes();
            nodes.addAll(currentNodes);
        }
        else {
            NodeInterface node = context.get(DefaultScriptContext.KEY_SELECTED_NODE, NodeInterface.class);
            LOGGER.info("Fetched the registered selected node: {}", node);
            nodes.add(node);
        }

        if (CollectionUtils.isEmpty(nodes)) {
            LOGGER.warn("No node selected and registered in context. Skip set CV values.");
            throw new ScriptExecutionException("No registered node in execution context.", this);
        }

        if (this.processParallel) {

            // we want at least 2 workers
            final ThreadFactory namedThreadFactory =
                new ThreadFactoryBuilder().setNameFormat("featureGetAllWorkers-thread-%d").build();
            ExecutorService worker = Executors.newScheduledThreadPool(nodes.size(), namedThreadFactory);

            LOGGER.info("Fetch the features from the nodes with parallel execution.");

            try {
                for (NodeInterface node : nodes) {
                    worker.submit(() -> scripting.featuresGetAll(node.getUniqueId(), true));
                }
            }
            finally {

                try {
                    worker.shutdown();
                    worker.awaitTermination(30, TimeUnit.SECONDS);
                }
                catch (Exception ex) {
                    LOGGER.warn("Wait for shutdown of worker threadpool failed.", ex);
                }
            }
        }
        else {
            for (NodeInterface node : nodes) {
                scripting.featuresGetAll(node.getUniqueId(), true);
            }
        }
    }

}