net.sf.jacclog.service.importer.commands.internal.ImportStatsShellCommand.java Source code

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Here is the source code for net.sf.jacclog.service.importer.commands.internal.ImportStatsShellCommand.java

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/*******************************************************************************
 * Copyright 2011 Andr Roul
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 ******************************************************************************/
package net.sf.jacclog.service.importer.commands.internal;

import java.util.Formatter;

import org.apache.felix.gogo.commands.Command;
import org.apache.karaf.shell.console.OsgiCommandSupport;
import org.joda.time.Duration;
import org.joda.time.Period;
import org.joda.time.format.PeriodFormatter;
import org.joda.time.format.PeriodFormatterBuilder;

import net.sf.jacclog.service.importer.api.LogFileImporter;
import net.sf.jacclog.service.importer.api.LogFileImporterStatistic;
import net.sf.jacclog.service.importer.api.LogFileImporterStatistic.Entry;

/**
 * Command to show statistics of the recently finished imports.
 * 
 * @author Andr Roul
 */
@Command(scope = "jacclog", name = "import-stats", description = "Shows statistics of the recently finished imports.")
@SuppressWarnings("PMD.SystemPrintln")
public class ImportStatsShellCommand extends OsgiCommandSupport {

    private LogFileImporter importer;

    /**
     * Separator for the period formatter
     */
    private static final String SEPARATOR = " ";

    /**
     * Formatter to format the elapsed time (period) to import log entries
     */
    private static final PeriodFormatter FORMATTER = new PeriodFormatterBuilder().printZeroRarelyLast()
            .appendHours().appendSuffix("H").appendSeparator(SEPARATOR).appendMinutes().appendSuffix("m")
            .appendSeparator(SEPARATOR).appendSeconds().appendSuffix("s").appendSeparator(SEPARATOR).appendMillis()
            .appendSuffix("ms").toFormatter();

    @Override
    protected Object doExecute() throws Exception {
        if (importer != null) {
            final LogFileImporterStatistic statistic = importer.getStatistic();
            renderEntries(statistic);

        } else {
            log.warn("No log file importer is available.");
        }

        return null;
    }

    public LogFileImporter getImporter() {
        return importer;
    }

    private void renderEntries(final LogFileImporterStatistic statistic) {
        if (statistic.getEntries() != null && !statistic.getEntries().isEmpty()) {
            final int size = (statistic.getEntries().get(0).getFile() != null)
                    ? statistic.getEntries().get(0).getFile().getFile().getPath().length() + 8
                    : 32;
            final String format = "%-" + size + "s%10s%18s";
            final StringBuilder builder = new StringBuilder();
            builder.append('\n');
            final Formatter formatter = new Formatter(builder);
            formatter.format(format, "Path", "Count", "Elapsed time");
            builder.append('\n');

            String path;
            Period p;
            int totalCount = 0;
            Duration totalElapsedTime = new Duration(0);
            for (final Entry entry : statistic.getEntries()) {
                path = entry.getFile().getFile().getPath();
                p = entry.getElapsedTime();
                totalElapsedTime = totalElapsedTime.plus(p.toStandardDuration());
                totalCount += entry.getCount();
                formatter.format(format, path, entry.getCount(), p.toString(FORMATTER));
                builder.append('\n');
            }

            builder.append('\n');
            builder.append("Total imported entries: " + totalCount);
            builder.append('\n');
            builder.append("Total processing time: " + totalElapsedTime.toPeriod().toString(FORMATTER));
            builder.append('\n');

            System.out.println(builder);
        } else {
            System.out.println("No files have been recently imported.");
        }
    }

    public void setImporter(final LogFileImporter importer) {
        this.importer = importer;
    }

}