+
−/*
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− * This Source Code Form is subject to the terms of the Mozilla Public
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− * License, v. 2.0.  If a copy of the MPL was not distributed with this
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− * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
− *
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− * Copyright 2016 MonetDB B.V.
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− */
+
−
+
−package nl.cwi.monetdb.embedded;
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−
+
−import java.util.ArrayList;
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−import java.util.List;
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−
+
−/**
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− * An embedded version of a MonetDB database.
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− * Communication between Java and native C is done via JNI.
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− * <br/>
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− * <strong>Note</strong>: You can have only one Embedded MonetDB database running per JVM process.
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− *
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− * @author <a href="mailto:pedro.ferreira@monetdbsolutions.com">Pedro Ferreira</a>
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− */
+
−public class MonetDBEmbeddedDatabase {
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−
+
−    /**
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−     * Starts a MonetDB database on the given farm.
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−     *
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−     * @param dbDirectory The full path of the farm
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−     * @param silentFlag A boolean if silent mode will be turned on or not
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−     * @param sequentialFlag A boolean indicating if the sequential pipeline will be set or not
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−     * @return A MonetDBEmbeddedDatabase instance
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−     * @throws MonetDBEmbeddedException If the JNI library has not been loaded yet or an error in the database occurred
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−     */
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−    public static MonetDBEmbeddedDatabase StartDatabase(String dbDirectory, boolean silentFlag, boolean sequentialFlag)
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−            throws MonetDBEmbeddedException {
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−        if(!MonetDBEmbeddedInstance.IsEmbeddedInstanceInitialized()) {
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−            throw new MonetDBEmbeddedException("The embedded instance has not been loaded yet!");
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−        } else {
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−            return StartDatabaseInternal(dbDirectory, silentFlag, sequentialFlag);
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−        }
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−    }
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−
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−    /**
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−     * Starts a MonetDB database on the given farm asynchronously.
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−     *
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−     * @param dbDirectory The full path of the farm
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−     * @param silentFlag A boolean if silent mode will be turned on or not
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−     * @param sequentialFlag A boolean indicating if the sequential pipeline will be set or not
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−     * @return A MonetDBEmbeddedDatabase instance
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−     * @throws MonetDBEmbeddedException If the JNI library has not been loaded yet or an error in the database occurred
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−     */
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−    public static MonetDBEmbeddedDatabase StartDatabaseAsync(String dbDirectory, boolean silentFlag,
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−                                                             boolean sequentialFlag) throws MonetDBEmbeddedException {
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−        /* CompletableFuture.supplyAsync(() -> StartDatabase(dbDirectory, silentFlag, sequentialFlag)); */
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−        throw new UnsupportedOperationException("Must wait for Java 8 :(");
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−    }
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−
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−    private final String databaseDirectory;
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−
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−    private final boolean silentFlag;
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−
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−    private final boolean sequentialFlag;
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−
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−    private boolean isRunning = true;
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−
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−    private final List<MonetDBEmbeddedConnection> connections = new ArrayList<>();
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−
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−    private MonetDBEmbeddedDatabase(String dbDirectory, boolean silentFlag, boolean sequentialFlag) {
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−        this.databaseDirectory = dbDirectory;
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−        this.silentFlag = silentFlag;
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−        this.sequentialFlag = sequentialFlag;
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−    }
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−
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−    /**
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−     * Get the database farm directory.
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−     *
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−     * @return A String representing the farm directory
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−     */
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−    public String getDatabaseDirectory() {
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−        return databaseDirectory;
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−    }
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−
+
−    /**
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−     * Check if the Silent Flag was set while creating the database.
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−     *
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−     * @return The Silent Flag
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−     */
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−    public boolean isSilentFlagSet() {
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−        return silentFlag;
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−    }
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−
+
−    /**
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−     * Check if the Sequential Flag was set while creating the database.
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−     *
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−     * @return The Sequential Flag
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−     */
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−    public boolean isSequentialFlagSet() {
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−        return sequentialFlag;
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−    }
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−
+
−    /**
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−     * Check if the database is still running or not.
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−     *
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−     * @return A boolean indicating if the database is running
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−     */
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−    public boolean isRunning() { return isRunning; }
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−
+
−    /**
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−     * Stops the database. All the pending connections will be shut down as well.
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−     *
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−     * @throws MonetDBEmbeddedException If the database is not running or an error in the database occurred
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−     */
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−    public void stopDatabase() throws MonetDBEmbeddedException {
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−        if(this.isRunning) {
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−            for(MonetDBEmbeddedConnection mdbec : connections) {
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−                mdbec.closeConnection();
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−            }
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−            this.connections.clear();
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−            this.stopDatabaseInternal();
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−            this.isRunning = false;
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−        } else {
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−            throw new MonetDBEmbeddedException("The database is not running!");
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−        }
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−    }
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−
+
−    /**
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−     * Stops the database asynchronously. All the pending connections will be shut down as well.
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−     *
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−     * @throws MonetDBEmbeddedException If the database is not running or an error in the database occurred
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−     */
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−    public void stopDatabaseAsync() throws MonetDBEmbeddedException {
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−        /* CompletableFuture.supplyAsync(() -> this.stopDatabase()); */
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−        throw new UnsupportedOperationException("Must wait for Java 8 :(");
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−    }
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−
+
−    /**
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−     * Creates a connection on the database, set on the default schema.
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−     *
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−     * @return A MonetDBEmbeddedConnection instance
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−     * @throws MonetDBEmbeddedException If the database is not running or an error in the database occurred
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−     */
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−    public MonetDBEmbeddedConnection createConnection() throws MonetDBEmbeddedException {
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−        return this.createConnectionInternal();
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−    }
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−
+
−    /**
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−     * Creates a connection on the database, set on the default schema asynchronously.
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−     *
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−     * @return A MonetDBEmbeddedConnection instance
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−     * @throws MonetDBEmbeddedException If the database is not running or an error in the database occurred
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−     */
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−    public MonetDBEmbeddedConnection createConnectionAsync() throws MonetDBEmbeddedException {
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−        /* CompletableFuture.supplyAsync(() -> this.createConnectionInternal()); */
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−        throw new UnsupportedOperationException("Must wait for Java 8 :(");
+
−    }
+
−
+
−    /**
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−     * Removes a connection from this database.
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−     */
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−    protected void removeConnection(MonetDBEmbeddedConnection con) {
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−        this.connections.remove(con);
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−    }
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−
+
−    private static native MonetDBEmbeddedDatabase StartDatabaseInternal(String dbDirectory, boolean silentFlag,
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−                                                                        boolean sequentialFlag)
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−            throws MonetDBEmbeddedException;
+
−
+
−    private native void stopDatabaseInternal();
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−
+
−    private native MonetDBEmbeddedConnection createConnectionInternal() throws MonetDBEmbeddedException;
+
−}