/*
* 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.stream.view;
import co.cask.cdap.api.data.format.FormatSpecification;
import co.cask.cdap.api.data.format.Formats;
import co.cask.cdap.api.data.schema.Schema;
import co.cask.cdap.cli.ArgumentName;
import co.cask.cdap.cli.CLIConfig;
import co.cask.cdap.cli.util.AbstractAuthCommand;
import co.cask.cdap.cli.util.ArgumentParser;
import co.cask.cdap.client.StreamViewClient;
import co.cask.cdap.proto.Id;
import co.cask.cdap.proto.ViewSpecification;
import co.cask.common.cli.Arguments;
import com.google.common.base.Joiner;
import com.google.inject.Inject;
import java.io.IOException;
import java.io.PrintStream;
import java.util.Collections;
import java.util.Map;
import javax.annotation.Nullable;
/**
* Creates or updates a stream view.
*/
public class CreateOrUpdateStreamViewCommand extends AbstractAuthCommand {
private final StreamViewClient client;
@Inject
public CreateOrUpdateStreamViewCommand(StreamViewClient client, CLIConfig cliConfig) {
super(cliConfig);
this.client = client;
}
@Override
public void perform(Arguments arguments, PrintStream output) throws Exception {
Id.Stream streamId = Id.Stream.from(cliConfig.getCurrentNamespace(), arguments.get(ArgumentName.STREAM.toString()));
Id.Stream.View viewId = Id.Stream.View.from(streamId, arguments.get(ArgumentName.VIEW.toString()));
String formatName = arguments.get(ArgumentName.FORMAT.toString());
Schema schema = getSchema(arguments);
Map<String, String> settings = Collections.emptyMap();
if (arguments.hasArgument(ArgumentName.SETTINGS.toString())) {
settings = ArgumentParser.parseMap(arguments.get(ArgumentName.SETTINGS.toString()));
}
FormatSpecification formatSpecification = new FormatSpecification(formatName, schema, settings);
ViewSpecification viewSpecification = new ViewSpecification(formatSpecification);
boolean created = client.createOrUpdate(viewId, viewSpecification);
if (created) {
output.printf("Successfully created stream-view '%s'\n", viewId.getId());
} else {
output.printf("Successfully updated stream-view '%s'\n", viewId.getId());
}
}
@Override
public String getPattern() {
return String.format("create stream-view <%s> <%s> format <%s> [schema <%s>] [settings <%s>]",
ArgumentName.STREAM, ArgumentName.VIEW, ArgumentName.FORMAT,
ArgumentName.SCHEMA, ArgumentName.SETTINGS);
}
@Override
public String getDescription() {
return String.format("Creates or updates a stream-view. Valid '<%s>'s are '%s'. '<%s>' is a SQL-like schema " +
"'column_name data_type, ...' or an Avro-like JSON schema and '<%s>' is specified in the format " +
"'key1=v1 key2=v2'.",
ArgumentName.FORMAT, Joiner.on("', '").join(Formats.ALL), ArgumentName.SCHEMA, ArgumentName.SETTINGS);
}
@Nullable
private Schema getSchema(Arguments arguments) throws IOException {
if (!arguments.hasArgument(ArgumentName.SCHEMA.toString())) {
return null;
}
// if it's a json object, try to parse it as json
String schemaStr = arguments.get(ArgumentName.SCHEMA.toString());
try {
return Schema.parseJson(schemaStr);
} catch (Exception e) {
return Schema.parseSQL(schemaStr);
}
}
}