/**
* Copyright (c) 2009, WSO2 Inc. (http://www.wso2.org) All Rights Reserved.
*
* WSO2 Inc. licenses this file to you under the Apache License,
* Version 2.0 (the "License"); you may not use this file 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.wso2.carbon.eventing.eventsource;
import org.apache.axis2.deployment.DeploymentEngine;
import org.apache.axis2.engine.AxisConfiguration;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.synapse.config.SynapseConfiguration;
import org.apache.synapse.config.xml.MultiXMLConfigurationBuilder;
import org.apache.synapse.core.SynapseEnvironment;
import org.apache.synapse.deployers.SynapseArtifactDeploymentStore;
import org.apache.synapse.eventing.SynapseEventSource;
import org.osgi.service.component.ComponentContext;
import org.wso2.carbon.eventing.eventsource.util.ConfigHolder;
import org.wso2.carbon.mediation.initializer.ServiceBusConstants;
import org.wso2.carbon.mediation.initializer.ServiceBusUtils;
import org.wso2.carbon.mediation.initializer.services.SynapseConfigurationService;
import org.wso2.carbon.mediation.initializer.services.SynapseEnvironmentService;
import org.wso2.carbon.mediation.initializer.services.SynapseRegistrationsService;
import org.wso2.carbon.registry.core.exceptions.RegistryException;
import org.wso2.carbon.registry.core.service.RegistryService;
import org.wso2.carbon.utils.ConfigurationContextService;
import org.wso2.carbon.utils.multitenancy.MultitenantConstants;
import java.io.File;
import java.util.Map;
import java.util.Set;
/**
* @scr.component name="org.wso2.carbon.eventing.eventsource" immediate="true"
* @scr.reference name="configuration.context.service"
* interface="org.wso2.carbon.utils.ConfigurationContextService" cardinality="1..1"
* policy="dynamic" bind="setConfigurationContextService" unbind="unsetConfigurationContextService"
* @scr.reference name="synapse.config.service"
* interface="org.wso2.carbon.mediation.initializer.services.SynapseConfigurationService"
* cardinality="1..1" policy="dynamic" bind="setSynapseConfigurationService"
* unbind="unsetSynapseConfigurationService"
* @scr.reference name="synapse.env.service"
* interface="org.wso2.carbon.mediation.initializer.services.SynapseEnvironmentService"
* cardinality="1..n" policy="dynamic" bind="setSynapseEnvironmentService"
* unbind="unsetSynapseEnvironmentService"
* @scr.reference name="registry.service"
* interface="org.wso2.carbon.registry.core.service.RegistryService"
* cardinality="1..1" policy="dynamic"
* bind="setRegistryService" unbind="unsetRegistryService"
* @scr.reference name="synapse.registrations.service"
* interface="org.wso2.carbon.mediation.initializer.services.SynapseRegistrationsService"
* cardinality="1..n" policy="dynamic" bind="setSynapseRegistrationsService"
* unbind="unsetSynapseRegistrationsService"
*/
@SuppressWarnings({"UnusedDeclaration", "JavaDoc"})
public class EventSourceServiceComponent {
private static final Log log = LogFactory.getLog(EventSourceServiceComponent.class);
private boolean activated = false;
protected void activate(ComponentContext context) {
try {
SynapseEnvironmentService synEnvService =
ConfigHolder.getInstance().getSynapseEnvironmentService(
MultitenantConstants.SUPER_TENANT_ID);
registerDeployer(ConfigHolder.getInstance().getAxisConfiguration(),
synEnvService.getSynapseEnvironment());
if (log.isDebugEnabled()) {
log.debug("EventSource Admin bundle is activated for Super tenant");
}
activated = true;
} catch (EventSourceAdminException e) {
log.error("Error while initializing the Event sources component.", e);
}
}
/**
* Registers the eventsource.
*
* @param axisConfig AxisConfiguration to which this deployer belongs
* @param synapseEnvironment SynapseEnvironment to which this deployer belongs
*/
private void registerDeployer(AxisConfiguration axisConfig, SynapseEnvironment synapseEnvironment)
throws EventSourceAdminException {
SynapseConfiguration synCfg = synapseEnvironment.getSynapseConfiguration();
DeploymentEngine deploymentEngine = (DeploymentEngine) axisConfig.getConfigurator();
SynapseArtifactDeploymentStore deploymentStore = synCfg.getArtifactDeploymentStore();
String synapseConfigPath = ServiceBusUtils.getSynapseConfigAbsPath(
synapseEnvironment.getServerContextInformation());
String eventSourceDirPath = synapseConfigPath
+ File.separator + MultiXMLConfigurationBuilder.EVENTS_DIR;
for (SynapseEventSource ses : synCfg.getEventSources()) {
if (ses.getFileName() != null) {
deploymentStore.addRestoredArtifact(
eventSourceDirPath + File.separator + ses.getFileName());
}
}
deploymentEngine.addDeployer(new EventSourceDeployer(),
eventSourceDirPath, ServiceBusConstants.ARTIFACT_EXTENSION);
}
protected void deactivate(ComponentContext context) {
try {
Set<Map.Entry<Integer, SynapseEnvironmentService>> entrySet =
ConfigHolder.getInstance().getSynapseEnvironmentServices().entrySet();
for (Map.Entry<Integer, SynapseEnvironmentService> entry : entrySet) {
unregisterDeployer(
entry.getValue().getConfigurationContext().getAxisConfiguration(),
entry.getValue().getSynapseEnvironment());
}
} catch (EventSourceAdminException e) {
log.warn("Couldn't remove the EventSourceDeployer");
}
}
/**
* Un-registers the eventsource.
*
* @param axisConfig AxisConfiguration to which this deployer belongs
* @param synapseEnvironment SynapseEnvironment to which this deployer belongs
*/
private void unregisterDeployer(AxisConfiguration axisConfig, SynapseEnvironment synapseEnvironment)
throws EventSourceAdminException {
if (axisConfig != null) {
DeploymentEngine deploymentEngine = (DeploymentEngine) axisConfig.getConfigurator();
String synapseConfigPath = ServiceBusUtils.getSynapseConfigAbsPath(
synapseEnvironment.getServerContextInformation());
String eventSourceDirPath = synapseConfigPath
+ File.separator + MultiXMLConfigurationBuilder.EVENTS_DIR;
deploymentEngine.removeDeployer(
eventSourceDirPath, ServiceBusConstants.ARTIFACT_EXTENSION);
}
}
protected void setSynapseRegistrationsService(
SynapseRegistrationsService synapseRegistrationsService) {
}
protected void unsetSynapseRegistrationsService(
SynapseRegistrationsService synapseRegistrationsService) {
int tenantId = synapseRegistrationsService.getTenantId();
if (ConfigHolder.getInstance().getSynapseEnvironmentServices().containsKey(tenantId)) {
SynapseEnvironment env = ConfigHolder.getInstance().
getSynapseEnvironmentService(tenantId).getSynapseEnvironment();
ConfigHolder.getInstance().removeSynapseEnvironmentService(
synapseRegistrationsService.getTenantId());
AxisConfiguration axisConfig = synapseRegistrationsService.getConfigurationContext().
getAxisConfiguration();
if (axisConfig != null) {
try {
unregisterDeployer(axisConfig, env);
} catch (EventSourceAdminException e) {
log.warn("Couldn't remove the EventSourceDeployer");
}
}
}
}
protected void setConfigurationContextService(ConfigurationContextService cfgCtxService) {
ConfigHolder.getInstance().setAxisConfiguration(
cfgCtxService.getServerConfigContext().getAxisConfiguration());
}
protected void unsetConfigurationContextService(ConfigurationContextService cfgCtxService) {
ConfigHolder.getInstance().setAxisConfiguration(null);
}
protected void setSynapseConfigurationService(
SynapseConfigurationService synapseConfigurationService) {
ConfigHolder.getInstance().setSynapseConfiguration(
synapseConfigurationService.getSynapseConfiguration());
}
protected void unsetSynapseConfigurationService(
SynapseConfigurationService synapseConfigurationService) {
ConfigHolder.getInstance().setSynapseConfiguration(null);
}
/**
* Here we receive an event about the creation of a SynapseEnvironment. If this is
* SuperTenant we have to wait until all the other constraints are met and actual
* initialization is done in the activate method. Otherwise we have to do the activation here.
*
* @param synapseEnvironmentService SynapseEnvironmentService which contains information
* about the new Synapse Instance
*/
protected void setSynapseEnvironmentService(
SynapseEnvironmentService synapseEnvironmentService) {
boolean alreadyCreated = ConfigHolder.getInstance().getSynapseEnvironmentServices().
containsKey(synapseEnvironmentService.getTenantId());
ConfigHolder.getInstance().addSynapseEnvironmentService(
synapseEnvironmentService.getTenantId(),
synapseEnvironmentService);
if (activated) {
if (!alreadyCreated) {
try {
registerDeployer(synapseEnvironmentService.getConfigurationContext().getAxisConfiguration(),
synapseEnvironmentService.getSynapseEnvironment());
} catch (EventSourceAdminException e) {
log.error("Error while initializing the Event sources component.", e);
}
}
}
}
/**
* Here we receive an event about Destroying a SynapseEnvironment. This can be the super tenant
* destruction or a tenant destruction.
*
* @param synapseEnvironmentService synapseEnvironment
*/
protected void unsetSynapseEnvironmentService(
SynapseEnvironmentService synapseEnvironmentService) {
ConfigHolder.getInstance().removeSynapseEnvironmentService(
synapseEnvironmentService.getTenantId());
}
protected void setRegistryService(RegistryService regService) {
if (log.isDebugEnabled()) {
log.debug("RegistryService bound to the ESB initialization process");
}
try {
ConfigHolder.getInstance().setRegistry(regService.getConfigSystemRegistry());
} catch (RegistryException e) {
log.error("Couldn't retrieve the registry from the registry service");
}
}
protected void unsetRegistryService(RegistryService regService) {
if (log.isDebugEnabled()) {
log.debug("RegistryService unbound from the ESB environment");
}
ConfigHolder.getInstance().setRegistry(null);
}
}