org.hibersap.session.SessionImpl Maven / Gradle / Ivy

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/*
 * Copyright (c) 2008-2017 akquinet tech@spree GmbH
 *
 * This file is part of Hibersap.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this software except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.hibersap.session;

import java.util.Map;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.hibersap.HibersapException;
import org.hibersap.execution.Connection;
import org.hibersap.execution.PojoMapper;
import org.hibersap.interceptor.BapiInterceptor;
import org.hibersap.interceptor.ExecutionInterceptor;
import org.hibersap.mapping.model.BapiMapping;
import org.hibersap.util.Announcer;

/*
 * @author Carsten Erker
 */
public class SessionImpl implements Session, SessionImplementor {

    private static final Log LOG = LogFactory.getLog(SessionImpl.class);

    private final SessionManagerImplementor sessionManager;
    private final Announcer executionInterceptors = Announcer.to(ExecutionInterceptor.class);
    private final Announcer bapiInterceptors = Announcer.to(BapiInterceptor.class);
    private final Credentials credentials;
    private boolean closed = false;
    private PojoMapper pojoMapper;
    private Connection connection;

    public SessionImpl(final SessionManagerImplementor sessionManager) {
        this(sessionManager, null);
    }

    public SessionImpl(final SessionManagerImplementor sessionManager, final Credentials credentials) {
        this.sessionManager = sessionManager;
        this.credentials = credentials;

        pojoMapper = new PojoMapper(sessionManager.getConverterCache());
        connection = sessionManager.getContext().getConnection();
        if (credentialsProvided()) {
            LOG.debug("Providing credentials");
            connection.setCredentials(credentials);
        }
        executionInterceptors.addAllListeners(sessionManager.getExecutionInterceptors());
        bapiInterceptors.addAllListeners(sessionManager.getBapiInterceptors());
    }

    public Transaction beginTransaction() {
        assertNotClosed();
        return connection.beginTransaction(this);
    }

    public void close() {
        assertNotClosed();
        connection.close();
        setClosed();
    }

    private boolean credentialsProvided() {
        return credentials != null;
    }

    private void assertNotClosed() {
        if (isClosed()) {
            throw new HibersapException("Session is already closed");
        }
    }

    public void execute(final Object bapiObject) {
        assertNotClosed();
        Class bapiClass = bapiObject.getClass();
        Map bapiMappings = sessionManager.getBapiMappings();
        if (bapiMappings.containsKey(bapiClass.getName())) {
            bapiInterceptors.announce().beforeExecution(bapiObject);
            execute(bapiObject, bapiMappings.get(bapiClass.getName()));
            bapiInterceptors.announce().afterExecution(bapiObject);
        } else {
            throw new HibersapException(bapiClass.getName() + " is not mapped as a Bapi class");
        }
    }

    public void execute(final Object bapiObject, final BapiMapping bapiMapping) {
        assertNotClosed();

        String bapiName = bapiMapping.getBapiName();
        LOG.debug("Executing " + bapiName);

        Map functionMap = pojoMapper.mapPojoToFunctionMap(bapiObject, bapiMapping);

        executionInterceptors.announce().beforeExecution(bapiMapping, functionMap);

        connection.execute(bapiMapping, functionMap);

        executionInterceptors.announce().afterExecution(bapiMapping, functionMap);

        pojoMapper.mapFunctionMapToPojo(bapiObject, functionMap, bapiMapping);
    }

    public SessionManagerImplementor getSessionManager() {
        return sessionManager;
    }

    public Transaction getTransaction() {
        assertNotClosed();
        return connection.getTransaction();
    }

    public boolean isClosed() {
        return closed;
    }

    private void setClosed() {
        closed = true;
    }

    public void addExecutionInterceptor(final ExecutionInterceptor interceptor) {
        executionInterceptors.addListener(interceptor);
    }

    public void addBapiInterceptor(final BapiInterceptor interceptor) {
        bapiInterceptors.addListener(interceptor);
    }
}