TestEsperStatement.java

/*
 * OpenCredo-Esper - simplifies adopting Esper in Java applications. 
 * Copyright (C) 2010  OpenCredo Ltd.
 * 
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * 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 General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */

package org.opencredo.esper;

import static org.junit.Assert.assertEquals;

import java.util.List;

import org.junit.Before;
import org.junit.Test;
import org.opencredo.esper.sample.SampleEvent;

import com.espertech.esper.client.EventBean;

public class TestEsperStatement {

    private EsperTemplate template;

    private EsperStatement statement;

    private ParameterizedEsperRowMapper<SampleEvent> rowMapper;

    @Before
    public void setupTemplateStatementAndRowMapper() throws Exception {
        this.template = new EsperTemplate();

        String epl = "select * from org.opencredo.esper.sample.SampleEvent";

        this.statement = new EsperStatement(epl);

        template.addStatement(statement);

        template.setName("testTemplate");

        template.initialize();

        this.rowMapper = new ParameterizedEsperRowMapper<SampleEvent>() {
            public SampleEvent mapRow(EventBean eventBean) {
                return (SampleEvent) eventBean.getUnderlying();
            }
        };
    }

    @Test
    public void testConcurrencySafeQueryForObject() throws Exception {

        SampleEvent event = new SampleEvent();
        template.sendEvent(event);

        SampleEvent result = statement.concurrentSafeQueryForObject(this.rowMapper);

        assertEquals(result, event);
    }

    @Test(expected = EsperStatementInvalidStateException.class)
    public void testConcurrencySafeQueryForObjectWhenStopped() throws Exception {

        statement.stop();

        SampleEvent event = new SampleEvent();

        template.sendEvent(event);

        statement.concurrentSafeQueryForObject(this.rowMapper);

    }

    @Test
    public void testConcurrencySafeQueryForObjectWhenStoppedAndRestarted() throws Exception {

        statement.stop();
        statement.start();

        SampleEvent event = new SampleEvent();

        template.sendEvent(event);

        SampleEvent result = statement.concurrentSafeQueryForObject(this.rowMapper);

        assertEquals(result, event);

    }

    @Test
    public void testConcurrencyUnsafeQueryForObject() throws Exception {

        SampleEvent event = new SampleEvent();
        template.sendEvent(event);

        SampleEvent result = statement.concurrentUnsafeQueryForObject(this.rowMapper);

        assertEquals(result, event);

    }

    @Test(expected = EsperStatementInvalidStateException.class)
    public void testConcurrencyUnsafeQueryForObjectWhenStopped() throws Exception {

        statement.stop();

        SampleEvent event = new SampleEvent();

        template.sendEvent(event);

        statement.concurrentUnsafeQueryForObject(this.rowMapper);

    }

    @Test
    public void testConcurrencyUnsafeQueryForObjectWhenStoppedAndRestarted() throws Exception {

        statement.stop();
        statement.start();

        SampleEvent event = new SampleEvent();

        template.sendEvent(event);

        SampleEvent result = statement.concurrentUnsafeQueryForObject(this.rowMapper);

        assertEquals(result, event);

    }

    @Test
    public void testConcurrencySafeQuery() throws Exception {

        SampleEvent event = new SampleEvent();
        template.sendEvent(event);

        List<SampleEvent> events = statement.concurrentSafeQuery(this.rowMapper);

        assertEquals(events.size(), 1);
        assertEquals(events.get(0), event);

    }

    @Test(expected = EsperStatementInvalidStateException.class)
    public void testConcurrencySafeQueryWhenStopped() throws Exception {

        statement.stop();

        SampleEvent event = new SampleEvent();

        template.sendEvent(event);

        statement.concurrentSafeQuery(this.rowMapper);

    }

    @Test
    public void testConcurrencySafeQueryWhenStoppedAndRestarted() throws Exception {

        statement.stop();
        statement.start();

        SampleEvent event = new SampleEvent();

        template.sendEvent(event);

        List<SampleEvent> events = statement.concurrentSafeQuery(this.rowMapper);

        assertEquals(events.size(), 1);
        assertEquals(events.get(0), event);

    }

    @Test
    public void testConcurrencyUnsafeQuery() throws Exception {

        SampleEvent event = new SampleEvent();
        template.sendEvent(event);

        List<SampleEvent> events = statement.concurrentUnsafeQuery(this.rowMapper);

        assertEquals(events.size(), 1);
        assertEquals(events.get(0), event);
    }

    @Test(expected = EsperStatementInvalidStateException.class)
    public void testConcurrencyUnsafeQueryWhenStopped() throws Exception {

        statement.stop();

        SampleEvent event = new SampleEvent();

        template.sendEvent(event);

        statement.concurrentUnsafeQuery(this.rowMapper);

    }

    @Test
    public void testConcurrencyUnsafeQueryWhenStoppedAndRestarted() throws Exception {

        statement.stop();
        statement.start();

        SampleEvent event = new SampleEvent();

        template.sendEvent(event);

        List<SampleEvent> events = statement.concurrentUnsafeQuery(this.rowMapper);

        assertEquals(events.size(), 1);
        assertEquals(events.get(0), event);

    }

}