DeepLearningVersionSelector.java

package plugins.danyfel80.deeplearningdownloader;

import java.awt.event.ActionListener;
import java.awt.event.WindowListener;
import java.io.IOException;
import java.util.Map;
import java.util.function.Function;
import java.util.stream.Collectors;

import org.bioimageanalysis.icy.deeplearning.versionmanager.loading.LibraryLoadingStatus;
import org.bioimageanalysis.icy.deeplearning.versionmanager.version.AvailableDeepLearningVersions;
import org.bioimageanalysis.icy.deeplearning.versionmanager.version.DeepLearningVersion;

import icy.gui.dialog.MessageDialog;
import icy.main.Icy;
import icy.plugin.PluginLauncher;
import icy.plugin.PluginLoader;
import icy.preferences.XMLPreferences;
import icy.system.IcyHandledException;
import icy.util.StringUtil;
import plugins.adufour.blocks.lang.Block;
import plugins.adufour.blocks.util.VarList;
import plugins.adufour.ezplug.EzPlug;
import plugins.adufour.ezplug.EzStoppable;
import plugins.adufour.ezplug.EzVarText;
import plugins.adufour.vars.lang.VarBoolean;
import plugins.adufour.vars.lang.VarString;

/**
 * This plugin allows users to select the TensorFlow version to load in memory.
 * Just select one of the available versions and click the "play" button to load the library.
 * Please keep in mind that only one version of TensorFlow can be loaded per Icy
 * execution. An Exception will be thrown if a TensorFlow version tries to loaded after another version has already been loaded.
 * 
 * @author Daniel Felipe Gonzalez Obando and Carlos Garcia Lopez de Haro
 */
public class DeepLearningVersionSelector extends EzPlug implements EzStoppable, Block
{
    private EzVarText varInVersion;
    private final static Map<String, DeepLearningVersion> versions;
    static
    {
        versions = AvailableDeepLearningVersions.loadCompatibleOnly().getVersions().stream()
                .collect(Collectors.toMap(
                        v -> v.getEngine() + "-" + v.getPythonVersion() + "-"
                        + (v.getMode().toLowerCase().equals("cpu") ? "cpu" : "cpu-gpu"),
                        Function.identity()));
    }

    /**
     * Main routine launching this plugin.
     * 
     * @param args
     */
    public static void main(String[] args)
    {
        Icy.main(args);
        PluginLauncher.start(PluginLoader.getPlugin(DeepLearningVersionSelector.class.getName()));
    }

    @Override
    protected void initialize()
    {
        String[] versionStrings = versions.keySet().stream().sorted().toArray(String[]::new);
        varInVersion = new EzVarText("Version", versionStrings, getDefaultVersionIndex(versionStrings), false);
        addEzComponent(varInVersion);
    }

    private VarString varInBlockVersion;

    @Override
    public void declareInput(VarList inputMap)
    {
        String lastUsedVersion = getLastUsedVersion();
        lastUsedVersion = (!lastUsedVersion.equals(""))
            ? lastUsedVersion
            : versions.keySet().stream().findFirst().orElse("");

        varInBlockVersion = new VarString("Library version", lastUsedVersion);
    }

    VarBoolean varOutLoaded;

    @Override
    public void declareOutput(VarList outputMap)
    {
        varOutLoaded = new VarBoolean("Loaded", false);
        outputMap.add("Loaded", varOutLoaded);
    }

    private int getDefaultVersionIndex(String[] versionStrings)
    {
        String lastUsedVersion = getLastUsedVersion();
        int lastIndex = 0;
        if (versions.containsKey(lastUsedVersion))
        {
            for (int i = 0; i < versionStrings.length; i++)
            {
                if (versionStrings[i].equals(lastUsedVersion))
                {
                    lastIndex = i;
                    break;
                }
            }
        }
        return lastIndex;
    }

    private String getLastUsedVersion()
    {
        XMLPreferences prefs = getPreferencesRoot();
        return prefs.get("lastUsed", "");
    }

    @Override
    protected void execute()
    {
        String targetVersion = (!isHeadLess()) ? varInVersion.getValue(true) : varInBlockVersion.getValue(true);

        DeepLearningVersion version = versions.get(targetVersion);
        try
        {
            notifyProgress(Double.NaN, "Loading TensorFlow " + version.getVersion() + "-" + version.getOs() + "-"
                    + version.getMode() + "...");

            LibraryLoadingStatus status = DeepLearningDownloader.loadLibrary(version, false,
                    (p, t) -> notifyProgress(p / t,
                            "Loading TensorFlow " + version.getVersion() + "-" + version.getOs() + "-"
                                    + version.getMode() + "..."));
            if (status.getStatus().equals(LibraryLoadingStatus.ERROR_LOADING))
                notifyError("Error loading TensorFlow: " + status.getMessage());
            else
                notifyInfo("Loaded: version=" + version.getVersion() + ", mode=" + version.getMode()
                        + ", for TF version=" + version.getPythonVersion());

            if (!isHeadLess())
                this.getUI().close();
            else
                varOutLoaded.setValue(true);
        }
        catch (IOException e)
        {
            if (isHeadLess())
                varOutLoaded.setValue(false);
            e.printStackTrace();
            throw new IcyHandledException("Could not load TensorFlow library: ", e);
        }
    }

    private boolean notifyProgress(double progress, String message)
    {
        if (isHeadLess())
        {
            System.out.println(
                    "(" + StringUtil.toString(Double.isFinite(progress) ? (progress * 100d) : 0d, 2) + "%)" + message);
        }
        else
        {
            getUI().setProgressBarValue(progress);
            getUI().setProgressBarMessage(message);
        }
        return false;
    }

    private void notifyError(String message)
    {
        if (isHeadLess())
        {
            System.err.println(message);
        }
        else
        {
            MessageDialog.showDialog("Error", message, MessageDialog.ERROR_MESSAGE);
        }
    }

    private void notifyInfo(String message)
    {
        if (isHeadLess())
        {
            System.out.println(message);
        }
        else
        {
            MessageDialog.showDialog("Success", message, MessageDialog.INFORMATION_MESSAGE);
        }
    }

    @Override
    public void clean()
    {
    	System.out.println("Closing plugin");
    }
    
    public void addPluginListener(WindowListener listener)
    {
        this.getUI().onClosed();
    }

}