frankgh commented on code in PR #160: URL: https://github.com/apache/cassandra-sidecar/pull/160#discussion_r1884618492
########## server/src/main/java/org/apache/cassandra/sidecar/db/schema/SidecarLeaseSchema.java: ########## @@ -0,0 +1,113 @@ +/* + * 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.cassandra.sidecar.db.schema; + +import java.util.concurrent.TimeUnit; + +import com.datastax.driver.core.PreparedStatement; +import com.datastax.driver.core.Session; +import com.google.inject.Inject; +import com.google.inject.Singleton; +import org.apache.cassandra.sidecar.config.SchemaKeyspaceConfiguration; +import org.apache.cassandra.sidecar.config.SidecarConfiguration; +import org.jetbrains.annotations.NotNull; +import org.jetbrains.annotations.VisibleForTesting; + +/** + * Table schema definition and operations for the {@code Sidecar lease} + */ +@Singleton +public class SidecarLeaseSchema extends TableSchema +{ + private static final String TABLE_NAME = "sidecar_lease_v1"; + + private final SchemaKeyspaceConfiguration keyspaceConfig; + + // prepared statements + private PreparedStatement claimLease; + private PreparedStatement extendLease; + + @Inject + public SidecarLeaseSchema(SidecarConfiguration configuration) + { + this(configuration.serviceConfiguration().schemaKeyspaceConfiguration()); + } + + public SidecarLeaseSchema(SchemaKeyspaceConfiguration keyspaceConfig) + { + this.keyspaceConfig = keyspaceConfig; + } + + /** + * {@inheritDoc} + */ + @Override + protected String tableName() + { + return TABLE_NAME; + } + + /** + * {@inheritDoc} + */ + @Override + protected String keyspaceName() + { + return keyspaceConfig.keyspace(); + } + + /** + * {@inheritDoc} + */ + @Override + @VisibleForTesting + public void prepareStatements(@NotNull Session session) + { + claimLease = prepare(claimLease, session, + String.format("INSERT INTO %s.%s (name,owner) VALUES ('single_sidecar_instance_executor',?) IF NOT EXISTS", + keyspaceName(), tableName())); + extendLease = prepare(extendLease, session, + String.format("UPDATE %s.%s SET owner = ? WHERE name = 'single_sidecar_instance_executor' IF owner = ?", + keyspaceName(), tableName())); + } + + /** + * {@inheritDoc} + */ + @Override + @VisibleForTesting + public String createSchemaStatement() + { + return String.format("CREATE TABLE IF NOT EXISTS %s.%s (" + + "name text PRIMARY KEY," + + "owner text) " + + "WITH default_time_to_live = %d", + keyspaceName(), tableName(), TimeUnit.MINUTES.toSeconds(10)); Review Comment: yeah, but there are risks with managing your TTLs, so I avoided doing that -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: pr-unsubscr...@cassandra.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: pr-unsubscr...@cassandra.apache.org For additional commands, e-mail: pr-h...@cassandra.apache.org
