io.cdap.cdap.internal.app.services.DefaultSystemTableConfigurer Maven / Gradle / Ivy
/*
* Copyright © 2019 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 io.cdap.cdap.internal.app.services;
import io.cdap.cdap.api.SystemTableConfigurer;
import io.cdap.cdap.spi.data.table.StructuredTableId;
import io.cdap.cdap.spi.data.table.StructuredTableSpecification;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
/**
* Configures system tables and prefixes all table ids to prevent clashes with CDAP platform tables.
*/
public class DefaultSystemTableConfigurer implements SystemTableConfigurer {
public static final String PREFIX = "app_";
private final List specs;
public DefaultSystemTableConfigurer() {
this.specs = new ArrayList<>();
}
@Override
public void createTable(StructuredTableSpecification tableSpecification) {
// prefix table ids to prevent clashes with the CDAP system.
specs.add(new StructuredTableSpecification.Builder(tableSpecification)
.withId(new StructuredTableId(PREFIX + tableSpecification.getTableId().getName()))
.build());
}
public Collection getTableSpecs() {
return Collections.unmodifiableList(specs);
}
}