com.torodb.backend.BackendTransactionImpl.java Source code

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Here is the source code for com.torodb.backend.BackendTransactionImpl.java

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/*
 * ToroDB
 * Copyright  2014 8Kdata Technology (www.8kdata.com)
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */

package com.torodb.backend;

import com.google.common.collect.Multimap;
import com.torodb.backend.ErrorHandler.Context;
import com.torodb.core.backend.BackendCursor;
import com.torodb.core.backend.BackendTransaction;
import com.torodb.core.backend.EmptyBackendCursor;
import com.torodb.core.backend.MetaInfoKey;
import com.torodb.core.cursors.Cursor;
import com.torodb.core.cursors.EmptyCursor;
import com.torodb.core.exceptions.InvalidDatabaseException;
import com.torodb.core.transaction.metainf.MetaCollection;
import com.torodb.core.transaction.metainf.MetaDatabase;
import com.torodb.core.transaction.metainf.MetaDocPart;
import com.torodb.core.transaction.metainf.MetaField;
import com.torodb.kvdocument.values.KvValue;
import org.jooq.DSLContext;
import org.jooq.lambda.tuple.Tuple2;

import java.sql.Connection;
import java.sql.SQLException;
import java.util.Optional;

/**
 *
 */
public abstract class BackendTransactionImpl implements BackendTransaction {

    private boolean closed = false;
    private final Connection connection;
    private final DSLContext dsl;
    private final SqlInterface sqlInterface;
    private final BackendConnectionImpl backendConnection;

    public BackendTransactionImpl(Connection connection, SqlInterface sqlInterface,
            BackendConnectionImpl backendConnection) {
        this.connection = connection;
        this.dsl = sqlInterface.getDslContextFactory().createDslContext(connection);
        this.sqlInterface = sqlInterface;
        this.backendConnection = backendConnection;
    }

    boolean isClosed() {
        return closed;
    }

    Connection getConnection() {
        return connection;
    }

    DSLContext getDsl() {
        return dsl;
    }

    SqlInterface getSqlInterface() {
        return sqlInterface;
    }

    BackendConnectionImpl getBackendConnection() {
        return backendConnection;
    }

    @Override
    public long getDatabaseSize(MetaDatabase db) {
        return sqlInterface.getMetaDataReadInterface().getDatabaseSize(getDsl(), db);
    }

    @Override
    public long countAll(MetaDatabase db, MetaCollection col) {
        return sqlInterface.getReadInterface().countAll(getDsl(), db, col);
    }

    @Override
    public long getCollectionSize(MetaDatabase db, MetaCollection col) {
        return sqlInterface.getMetaDataReadInterface().getCollectionSize(getDsl(), db, col);
    }

    @Override
    public long getDocumentsSize(MetaDatabase db, MetaCollection col) {
        return sqlInterface.getMetaDataReadInterface().getDocumentsSize(getDsl(), db, col);
    }

    @Override
    public BackendCursor findAll(MetaDatabase db, MetaCollection col) {
        try {
            Cursor<Integer> allDids = sqlInterface.getReadInterface().getAllCollectionDids(dsl, db, col);
            return new LazyBackendCursor(sqlInterface, allDids, dsl, db, col);
        } catch (SQLException ex) {
            throw sqlInterface.getErrorHandler().handleException(Context.FETCH, ex);
        }
    }

    @Override
    public BackendCursor findByField(MetaDatabase db, MetaCollection col, MetaDocPart docPart, MetaField field,
            KvValue<?> value) {
        try {
            Cursor<Integer> allDids = sqlInterface.getReadInterface().getCollectionDidsWithFieldEqualsTo(dsl, db,
                    col, docPart, field, value);
            return new LazyBackendCursor(sqlInterface, allDids, dsl, db, col);
        } catch (SQLException ex) {
            throw sqlInterface.getErrorHandler().handleException(Context.FETCH, ex);
        }
    }

    @Override
    public BackendCursor findByFieldIn(MetaDatabase db, MetaCollection col, MetaDocPart docPart,
            Multimap<MetaField, KvValue<?>> valuesMultimap) {
        try {
            if (valuesMultimap.isEmpty()) {
                return new EmptyBackendCursor();
            }
            Cursor<Integer> allDids = sqlInterface.getReadInterface().getCollectionDidsWithFieldsIn(dsl, db, col,
                    docPart, valuesMultimap);
            return new LazyBackendCursor(sqlInterface, allDids, dsl, db, col);
        } catch (SQLException ex) {
            throw sqlInterface.getErrorHandler().handleException(Context.FETCH, ex);
        }
    }

    @Override
    public Cursor<Tuple2<Integer, KvValue<?>>> findByFieldInProjection(MetaDatabase db, MetaCollection col,
            MetaDocPart docPart, Multimap<MetaField, KvValue<?>> valuesMultimap) {
        try {
            if (valuesMultimap.isEmpty()) {
                return new EmptyCursor<>();
            }
            return sqlInterface.getReadInterface().getCollectionDidsAndProjectionWithFieldsIn(dsl, db, col, docPart,
                    valuesMultimap);
        } catch (SQLException ex) {
            throw sqlInterface.getErrorHandler().handleException(Context.FETCH, ex);
        }
    }

    @Override
    public BackendCursor fetch(MetaDatabase db, MetaCollection col, Cursor<Integer> didCursor) {
        return new LazyBackendCursor(sqlInterface, didCursor, dsl, db, col);
    }

    @Override
    public Optional<KvValue<?>> readMetaInfo(MetaInfoKey key) throws IllegalArgumentException {
        return getBackendConnection().getMetaInfoHandler().readMetaInfo(getDsl(), key);
    }

    @Override
    public void checkMetaDataTables() throws InvalidDatabaseException {
        getSqlInterface().getStructureInterface().checkMetaDataTables(getDsl());
    }

    @Override
    public void rollback() {
        try {
            connection.rollback();
        } catch (SQLException ex) {
            sqlInterface.getErrorHandler().handleException(Context.ROLLBACK, ex);
        }
    }

    @Override
    public void close() {
        if (!closed) {
            closed = true;
            backendConnection.onTransactionClosed(this);
            try {
                connection.rollback();
                connection.close();
            } catch (SQLException ex) {
                sqlInterface.getErrorHandler().handleException(Context.CLOSE, ex);
            } finally {
                dsl.close();
            }
        }
    }

}