/*
*
* This is a simple Content Management System (CMS)
* Copyright (C) 2011 Imran M Yousuf (imyousuf@smartitengineering.com)
*
* 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 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.smartitengineering.cms.spi.impl.events;
import com.google.inject.Inject;
import com.google.inject.Singleton;
import com.smartitengineering.cms.api.content.Content;
import com.smartitengineering.cms.api.content.ContentId;
import com.smartitengineering.cms.api.event.Event;
import com.smartitengineering.cms.api.event.Event.Type;
import com.smartitengineering.cms.api.event.EventListener;
import com.smartitengineering.cms.api.type.ContentType;
import com.smartitengineering.cms.api.type.ContentTypeId;
import com.smartitengineering.cms.api.workspace.Sequence;
import com.smartitengineering.cms.api.workspace.SequenceId;
import com.smartitengineering.events.async.api.EventPublisher;
import java.io.ByteArrayOutputStream;
import org.apache.commons.codec.binary.Base64;
import org.apache.commons.lang.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
*
* @author imyousuf
*/
@Singleton
public class EventPublicationListener implements EventListener {
@Inject
private EventPublisher publisher;
private final transient Logger logger = LoggerFactory.getLogger(getClass());
static final byte[] NEW_LINE = org.apache.commons.codec.binary.StringUtils.getBytesUtf8("\n");
@Override
public boolean accepts(Event event) {
final Type eventSourceType = event.getEventSourceType();
return eventSourceType.equals(Type.CONTENT) || eventSourceType.equals(Type.CONTENT_TYPE) ||
eventSourceType.equals(Type.SEQUENCE);
}
@Override
public void notify(Event event) {
final String hexedContentId;
final Type eventSourceType = event.getEventSourceType();
try {
ByteArrayOutputStream contentBytes = new ByteArrayOutputStream();
if (eventSourceType.equals(Type.CONTENT)) {
ContentId contentId = ((Content) event.getSource()).getContentId();
contentBytes.write(org.apache.commons.codec.binary.StringUtils.getBytesUtf8(contentId.getWorkspaceId().
getGlobalNamespace()));
contentBytes.write(NEW_LINE);
contentBytes.write(
org.apache.commons.codec.binary.StringUtils.getBytesUtf8(contentId.getWorkspaceId().getName()));
contentBytes.write(NEW_LINE);
contentBytes.write(contentId.getId());
}
else if (eventSourceType.equals(Type.CONTENT_TYPE)) {
ContentTypeId typeId = ((ContentType) event.getSource()).getContentTypeID();
contentBytes.write(org.apache.commons.codec.binary.StringUtils.getBytesUtf8(typeId.getWorkspace().
getGlobalNamespace()));
contentBytes.write(NEW_LINE);
contentBytes.write(
org.apache.commons.codec.binary.StringUtils.getBytesUtf8(typeId.getWorkspace().getName()));
contentBytes.write(NEW_LINE);
contentBytes.write(org.apache.commons.codec.binary.StringUtils.getBytesUtf8(typeId.getNamespace()));
contentBytes.write(NEW_LINE);
contentBytes.write(org.apache.commons.codec.binary.StringUtils.getBytesUtf8(typeId.getName()));
}
else if (eventSourceType.equals(Type.SEQUENCE)) {
SequenceId seqId = ((Sequence) event.getSource()).getSequenceId();
contentBytes.write(org.apache.commons.codec.binary.StringUtils.getBytesUtf8(seqId.getWorkspaceId().
getGlobalNamespace()));
contentBytes.write(NEW_LINE);
contentBytes.write(
org.apache.commons.codec.binary.StringUtils.getBytesUtf8(seqId.getWorkspaceId().getName()));
contentBytes.write(NEW_LINE);
contentBytes.write(org.apache.commons.codec.binary.StringUtils.getBytesUtf8(seqId.getName()));
}
else {
logger.warn("Unrecognized event source type!");
}
hexedContentId = Base64.encodeBase64URLSafeString(contentBytes.toByteArray());
if (logger.isDebugEnabled()) {
logger.debug("Content of event message " + hexedContentId);
}
}
catch (Exception ex) {
logger.warn("Could not serialize content ID!", ex);
return;
}
if (StringUtils.isNotBlank(hexedContentId)) {
String message = new StringBuilder(eventSourceType.name()).append('\n').append(event.getEventType().
name()).append('\n').append(hexedContentId).toString();
if (logger.isDebugEnabled()) {
logger.debug("Publishing message " + message);
}
publisher.publishEvent("text/plain", message);
}
}
}