com.datastax.oss.driver.internal.core.metadata.schema.parsing.CassandraSchemaParser Maven / Gradle / Ivy
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* to you under the Apache License, Version 2.0 (the
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package com.datastax.oss.driver.internal.core.metadata.schema.parsing;
import com.datastax.oss.driver.api.core.CqlIdentifier;
import com.datastax.oss.driver.api.core.metadata.schema.AggregateMetadata;
import com.datastax.oss.driver.api.core.metadata.schema.FunctionMetadata;
import com.datastax.oss.driver.api.core.metadata.schema.FunctionSignature;
import com.datastax.oss.driver.api.core.metadata.schema.KeyspaceMetadata;
import com.datastax.oss.driver.api.core.metadata.schema.TableMetadata;
import com.datastax.oss.driver.api.core.metadata.schema.ViewMetadata;
import com.datastax.oss.driver.api.core.type.UserDefinedType;
import com.datastax.oss.driver.internal.core.adminrequest.AdminRow;
import com.datastax.oss.driver.internal.core.context.InternalDriverContext;
import com.datastax.oss.driver.internal.core.metadata.schema.DefaultKeyspaceMetadata;
import com.datastax.oss.driver.internal.core.metadata.schema.queries.SchemaRows;
import com.datastax.oss.driver.internal.core.metadata.schema.refresh.SchemaRefresh;
import com.datastax.oss.driver.internal.core.util.NanoTime;
import com.datastax.oss.driver.shaded.guava.common.base.MoreObjects;
import com.datastax.oss.driver.shaded.guava.common.collect.ImmutableMap;
import java.util.Collections;
import java.util.Map;
import net.jcip.annotations.ThreadSafe;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Default parser implementation for Cassandra.
*
* For modularity, the code for each element row is split into separate classes (schema stuff is
* not on the hot path, so creating a few extra objects doesn't matter).
*/
@ThreadSafe
public class CassandraSchemaParser implements SchemaParser {
private static final Logger LOG = LoggerFactory.getLogger(CassandraSchemaParser.class);
private final SchemaRows rows;
private final UserDefinedTypeParser userDefinedTypeParser;
private final TableParser tableParser;
private final ViewParser viewParser;
private final FunctionParser functionParser;
private final AggregateParser aggregateParser;
private final String logPrefix;
private final long startTimeNs = System.nanoTime();
public CassandraSchemaParser(SchemaRows rows, InternalDriverContext context) {
this.rows = rows;
this.logPrefix = context.getSessionName();
this.userDefinedTypeParser = new UserDefinedTypeParser(rows.dataTypeParser(), context);
this.tableParser = new TableParser(rows, context);
this.viewParser = new ViewParser(rows, context);
this.functionParser = new FunctionParser(rows.dataTypeParser(), context);
this.aggregateParser = new AggregateParser(rows.dataTypeParser(), context);
}
@Override
public SchemaRefresh parse() {
ImmutableMap.Builder keyspacesBuilder = ImmutableMap.builder();
for (AdminRow row : rows.keyspaces()) {
KeyspaceMetadata keyspace = parseKeyspace(row);
keyspacesBuilder.put(keyspace.getName(), keyspace);
}
for (AdminRow row : rows.virtualKeyspaces()) {
KeyspaceMetadata keyspace = parseVirtualKeyspace(row);
keyspacesBuilder.put(keyspace.getName(), keyspace);
}
SchemaRefresh refresh = new SchemaRefresh(keyspacesBuilder.build());
LOG.debug("[{}] Schema parsing took {}", logPrefix, NanoTime.formatTimeSince(startTimeNs));
return refresh;
}
private KeyspaceMetadata parseKeyspace(AdminRow keyspaceRow) {
// Cassandra <= 2.2
// CREATE TABLE system.schema_keyspaces (
// keyspace_name text PRIMARY KEY,
// durable_writes boolean,
// strategy_class text,
// strategy_options text
// )
//
// Cassandra >= 3.0:
// CREATE TABLE system_schema.keyspaces (
// keyspace_name text PRIMARY KEY,
// durable_writes boolean,
// replication frozen