/*
* Copyright © 2015 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.lineage;
import co.cask.cdap.cli.ArgumentName;
import co.cask.cdap.cli.CLIConfig;
import co.cask.cdap.cli.util.AbstractCommand;
import co.cask.cdap.cli.util.table.Table;
import co.cask.cdap.client.LineageClient;
import co.cask.cdap.proto.Id;
import co.cask.cdap.proto.metadata.lineage.LineageRecord;
import co.cask.common.cli.Arguments;
import com.google.common.collect.Lists;
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import com.google.inject.Inject;
import java.io.PrintStream;
import java.util.Collections;
import java.util.List;
/**
* Gets the lineage for a stream.
*/
public class GetStreamLineageCommand extends AbstractCommand {
private static final Gson GSON = new GsonBuilder().setPrettyPrinting().create();
private final LineageClient client;
@Inject
public GetStreamLineageCommand(CLIConfig cliConfig, LineageClient client) {
super(cliConfig);
this.client = client;
}
@Override
public void perform(Arguments arguments, PrintStream output) throws Exception {
long currentTime = System.currentTimeMillis();
Id.Stream stream = Id.Stream.from(cliConfig.getCurrentNamespace(), arguments.get(ArgumentName.STREAM.toString()));
long start = getTimestamp(arguments.getOptional("start", "min"), currentTime);
long end = getTimestamp(arguments.getOptional("end", "max"), currentTime);
Integer levels = arguments.getIntOptional("levels", null);
LineageRecord lineage = client.getLineage(stream, start, end, levels);
Table table = Table.builder()
.setHeader("start", "end", "relations", "programs", "data")
.setRows(
Collections.<List<String>>singletonList(
Lists.newArrayList(
Long.toString(lineage.getStart()), Long.toString(lineage.getEnd()), GSON.toJson(lineage.getRelations()),
GSON.toJson(lineage.getPrograms()), GSON.toJson(lineage.getData()))
)
).build();
cliConfig.getTableRenderer().render(cliConfig, output, table);
}
@Override
public String getPattern() {
return String.format("get lineage stream <%s> [start <start>] [end <end>] [levels <levels>]", ArgumentName.STREAM);
}
@Override
public String getDescription() {
return "Gets the lineage of a stream";
}
}