org.apache.accumulo.shell.commands.ShellPluginConfigurationCommand Maven / Gradle / Ivy

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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 org.apache.accumulo.shell.commands;

import java.util.Arrays;
import java.util.Iterator;
import java.util.Map.Entry;

import org.apache.accumulo.core.client.AccumuloException;
import org.apache.accumulo.core.client.AccumuloSecurityException;
import org.apache.accumulo.core.client.TableNotFoundException;
import org.apache.accumulo.core.conf.Property;
import org.apache.accumulo.shell.Shell;
import org.apache.accumulo.shell.Shell.Command;
import org.apache.commons.cli.BasicParser;
import org.apache.commons.cli.CommandLine;
import org.apache.commons.cli.Option;
import org.apache.commons.cli.OptionGroup;
import org.apache.commons.cli.Options;
import org.apache.commons.cli.ParseException;
import org.slf4j.LoggerFactory;

public abstract class ShellPluginConfigurationCommand extends Command {
  private Option removePluginOption, pluginClassOption, listPluginOption;

  private String pluginType;

  private Property tableProp;

  private String classOpt;

  ShellPluginConfigurationCommand(final String typeName, final Property tableProp, final String classOpt) {
    this.pluginType = typeName;
    this.tableProp = tableProp;
    this.classOpt = classOpt;
  }

  @Override
  public int execute(final String fullCommand, final CommandLine cl, final Shell shellState) throws Exception {
    final String tableName = OptUtil.getTableOpt(cl, shellState);

    if (cl.hasOption(removePluginOption.getOpt())) {
      // Remove the property
      removePlugin(cl, shellState, tableName);

      shellState.getReader().println("Removed " + pluginType + " on " + tableName);
    } else if (cl.hasOption(listPluginOption.getOpt())) {
      // Get the options for this table
      final Iterator> iter = shellState.getConnector().tableOperations().getProperties(tableName).iterator();

      while (iter.hasNext()) {
        Entry ent = iter.next();

        // List all parameters with the property name
        if (ent.getKey().startsWith(tableProp.toString())) {
          shellState.getReader().println(ent.getKey() + ": " + ent.getValue());
        }
      }
    } else {
      // Set the plugin with the provided options
      String className = cl.getOptionValue(pluginClassOption.getOpt());

      // Set the plugin property on the table
      setPlugin(cl, shellState, tableName, className);
    }

    return 0;
  }

  protected void setPlugin(final CommandLine cl, final Shell shellState, final String tableName, final String className) throws AccumuloException,
      AccumuloSecurityException {
    shellState.getConnector().tableOperations().setProperty(tableName, tableProp.toString(), className);
  }

  protected void removePlugin(final CommandLine cl, final Shell shellState, final String tableName) throws AccumuloException, AccumuloSecurityException {
    shellState.getConnector().tableOperations().removeProperty(tableName, tableProp.toString());
  }

  public static  Class getPluginClass(final String tableName, final Shell shellState, final Class clazz, final Property pluginProp) {
    Iterator> props;
    try {
      props = shellState.getConnector().tableOperations().getProperties(tableName).iterator();
    } catch (AccumuloException e) {
      return null;
    } catch (TableNotFoundException e) {
      return null;
    }

    while (props.hasNext()) {
      final Entry ent = props.next();
      if (ent.getKey().equals(pluginProp.toString())) {
        Class pluginClazz;
        String[] args = new String[2];
        try {
          Options o = new Options();
          o.addOption(OptUtil.tableOpt());
          args[0] = "-t";
          args[1] = tableName;
          CommandLine cl = new BasicParser().parse(o, args);
          pluginClazz = shellState.getClassLoader(cl, shellState).loadClass(ent.getValue()).asSubclass(clazz);
        } catch (ClassNotFoundException e) {
          LoggerFactory.getLogger(ShellPluginConfigurationCommand.class).error("Class not found {}", e.getMessage());
          return null;
        } catch (ParseException e) {
          LoggerFactory.getLogger(ShellPluginConfigurationCommand.class).error("Error parsing table: {} {}", Arrays.toString(args), e.getMessage());
          return null;
        } catch (TableNotFoundException e) {
          LoggerFactory.getLogger(ShellPluginConfigurationCommand.class).error("Table not found: {} {}", tableName, e.getMessage());
          return null;
        } catch (Exception e) {
          LoggerFactory.getLogger(ShellPluginConfigurationCommand.class).error("Error: {}", e.getMessage());
          return null;
        }

        return pluginClazz;
      }
    }

    return null;
  }

  @Override
  public Options getOptions() {
    final Options o = new Options();
    final OptionGroup actionGroup = new OptionGroup();

    pluginClassOption = new Option(classOpt, pluginType, true, "fully qualified name of the " + pluginType + " class to use");
    pluginClassOption.setArgName("className");

    // Action to take: apply (default), remove, list
    removePluginOption = new Option("r", "remove", false, "remove the current " + pluginType + "");
    listPluginOption = new Option("l", "list", false, "display the current " + pluginType + "");

    actionGroup.addOption(pluginClassOption);
    actionGroup.addOption(removePluginOption);
    actionGroup.addOption(listPluginOption);
    actionGroup.setRequired(true);

    o.addOptionGroup(actionGroup);
    o.addOption(OptUtil.tableOpt("table to set the " + pluginType + " on"));

    return o;
  }

  @Override
  public int numArgs() {
    return 0;
  }

}