/*
* Copyright © 2012-2014 Cask Data, Inc.
*
* 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 co.cask.cdap.cli.command;
import co.cask.cdap.api.data.format.FormatSpecification;
import co.cask.cdap.cli.ArgumentName;
import co.cask.cdap.cli.CLIConfig;
import co.cask.cdap.cli.ElementType;
import co.cask.cdap.cli.english.Article;
import co.cask.cdap.cli.english.Fragment;
import co.cask.cdap.cli.util.AbstractAuthCommand;
import co.cask.cdap.cli.util.RowMaker;
import co.cask.cdap.cli.util.table.Table;
import co.cask.cdap.client.StreamClient;
import co.cask.cdap.proto.Id;
import co.cask.cdap.proto.StreamProperties;
import co.cask.common.cli.Arguments;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.Lists;
import com.google.inject.Inject;
import java.io.PrintStream;
import java.util.List;
/**
* Shows detailed information about a stream.
*/
public class DescribeStreamCommand extends AbstractAuthCommand {
private final StreamClient streamClient;
@Inject
public DescribeStreamCommand(StreamClient streamClient, CLIConfig cliConfig) {
super(cliConfig);
this.streamClient = streamClient;
}
@Override
public void perform(Arguments arguments, PrintStream output) throws Exception {
Id.Stream streamId = Id.Stream.from(cliConfig.getCurrentNamespace(),
arguments.get(ArgumentName.STREAM.toString()));
StreamProperties config = streamClient.getConfig(streamId);
Table table = Table.builder()
.setHeader("ttl", "format", "schema", "notification.threshold.mb", "description")
.setRows(ImmutableList.of(config), new RowMaker<StreamProperties>() {
@Override
public List<?> makeRow(StreamProperties object) {
FormatSpecification format = object.getFormat();
return Lists.newArrayList(object.getTTL(), format.getName(), format.getSchema().toString(),
object.getNotificationThresholdMB(), object.getDescription());
}
}).build();
cliConfig.getTableRenderer().render(cliConfig, output, table);
}
@Override
public String getPattern() {
return String.format("describe stream <%s>", ArgumentName.STREAM);
}
@Override
public String getDescription() {
return String.format("Describes %s",
Fragment.of(Article.A, ElementType.STREAM.getName()));
}
}