com.zendesk.maxwell.recovery.RecoverySchemaStore Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of maxwell Show documentation

Maxwell's daemon. Watches mysql, outputs to JSON.

There is a newer version: 1.8.0

package com.zendesk.maxwell.recovery;

import com.zendesk.maxwell.CaseSensitivity;
import com.zendesk.maxwell.replication.Position;
import com.zendesk.maxwell.schema.*;
import com.zendesk.maxwell.schema.ddl.InvalidSchemaError;
import com.zendesk.maxwell.schema.ddl.ResolvedSchemaChange;
import com.zendesk.maxwell.util.ConnectionPool;

import java.sql.Connection;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;

/**
 * A schema store that contains only the maxwell database, and throws
 * away any schema changes we encounter while trying to recover the binlog position.
 */
public class RecoverySchemaStore implements SchemaStore {

	private ConnectionPool replicationConnectionPool;
	private String maxwellDatabaseName;
	private CaseSensitivity caseSensitivity;
	private Schema maxwellOnlySchema;

	public RecoverySchemaStore(ConnectionPool replicationConnectionPool,
							   String maxwellDatabaseName,
							   CaseSensitivity caseSensitivity) {

		this.replicationConnectionPool = replicationConnectionPool;
		this.maxwellDatabaseName = maxwellDatabaseName;
		this.caseSensitivity = caseSensitivity;
	}

	@Override
	public Schema getSchema() throws SchemaStoreException {
		if ( maxwellOnlySchema != null )
			return maxwellOnlySchema;

		try(Connection conn = replicationConnectionPool.getConnection() ) {
			SchemaCapturer capturer = new SchemaCapturer(conn, caseSensitivity, maxwellDatabaseName);
			maxwellOnlySchema = capturer.capture();
		} catch (SQLException e) {
			throw new SchemaStoreException(e);
		}

		return maxwellOnlySchema;
	}

	@Override
	public List processSQL(String sql, String currentDatabase, Position position) throws SchemaStoreException, InvalidSchemaError {
		return new ArrayList<>();
	}

	@Override
	public Long getSchemaID() throws SchemaStoreException {
		return new Long(0);
	}
}