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/*
* Copyright (c) 2005-2008, 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.mediation.initializer;
import org.apache.axis2.AxisFault;
import org.apache.axis2.context.ConfigurationContext;
import org.apache.axis2.deployment.DeploymentEngine;
import org.apache.axis2.description.Parameter;
import org.apache.axis2.engine.AxisConfiguration;
import org.apache.axis2.engine.Handler;
import org.apache.axis2.engine.Phase;
import org.apache.axis2.phaseresolver.PhaseMetadata;
import org.apache.axis2.util.JavaUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.synapse.Axis2SynapseController;
import org.apache.synapse.ServerConfigurationInformation;
import org.apache.synapse.ServerContextInformation;
import org.apache.synapse.SynapseConstants;
import org.apache.synapse.SynapseException;
import org.apache.synapse.commons.snmp.SNMPConstants;
import org.apache.synapse.commons.snmp.SynapseSNMPAgent;
import org.apache.synapse.config.Entry;
import org.apache.synapse.config.SynapseConfiguration;
import org.apache.synapse.config.SynapsePropertiesLoader;
import org.apache.synapse.config.xml.MultiXMLConfigurationSerializer;
import org.apache.synapse.core.axis2.MessageContextCreatorForAxis2;
import org.apache.synapse.core.axis2.ProxyService;
import org.apache.synapse.deployers.ClassMediatorDeployer;
import org.apache.synapse.deployers.ExtensionDeployer;
import org.wso2.carbon.CarbonConstants;
import org.wso2.carbon.base.ServerConfiguration;
import org.wso2.carbon.core.multitenancy.MultitenantDispatcher;
import org.wso2.carbon.registry.core.Resource;
import org.wso2.carbon.registry.core.exceptions.RegistryException;
import org.wso2.carbon.registry.core.service.RegistryService;
import org.wso2.carbon.registry.core.session.UserRegistry;
import java.io.File;
import java.io.IOException;
import java.util.List;
import java.util.Properties;
public class CarbonSynapseController extends Axis2SynapseController {
private static final Log log = LogFactory.getLog(CarbonSynapseController.class);
private static final String PARAMETER_VALUE_TRUE = Boolean.toString(true);
private String currentConfigurationName;
private String synapseXMLLocation;
private SynapseSNMPAgent snmpAgent;
@Override
public void init(ServerConfigurationInformation serverConfigurationInformation,
ServerContextInformation serverContextInformation) {
Object context = serverContextInformation.getServerContext();
if (context instanceof ConfigurationContext) {
AxisConfiguration axisCfg = ((ConfigurationContext) context).getAxisConfiguration();
synchronized (axisCfg) {
DeploymentEngine deploymentEngine = (DeploymentEngine) axisCfg.getConfigurator();
// File carbonHome = new File(System.getProperty(ServerConstants.CARBON_HOME));
// subjected to change
String carbonRepoPath = axisCfg.getRepository().getPath();
String mediatorsPath = carbonRepoPath + File.separator + "mediators";
String extensionsPath = carbonRepoPath + File.separator + "extensions";
ExtensionDeployer deployer = new ExtensionDeployer();
deploymentEngine.addDeployer(deployer, mediatorsPath, "xar");
deploymentEngine.addDeployer(deployer, extensionsPath, "xar");
deploymentEngine.addDeployer(deployer, mediatorsPath, "jar");
deploymentEngine.addDeployer(deployer, extensionsPath, "jar");
// Register deployer for class mediators
String classMediatorsPath = carbonRepoPath + File.separator + "class-mediators";
deploymentEngine.addDeployer(new ClassMediatorDeployer(),
classMediatorsPath,
ServiceBusConstants.CLASS_MEDIATOR_EXTENSION);
}
this.currentConfigurationName = ((ConfigurationContext) context).
getAxisConfiguration().getParameterValue(
ServiceBusConstants.SYNAPSE_CURRENT_CONFIGURATION).toString();
this.synapseXMLLocation = serverConfigurationInformation.getSynapseXMLLocation();
}
super.init(serverConfigurationInformation, serverContextInformation);
}
/**
* Adds the synapse handlers to the inflow Dispatch phase if not already exists and starts the listener manager
* if the axis2 instance is created by the Synapse
*/
public void start() {
/*Starting SNMP Agent if activated in */
Properties properties = SynapsePropertiesLoader.loadSynapseProperties();
String enabled = properties.getProperty(SNMPConstants.SNMP_ENABLED);
try {
if (enabled != null && JavaUtils.isTrueExplicitly(enabled)) {
snmpAgent = new SynapseSNMPAgent(properties);
snmpAgent.start();
}
} catch (IOException e) {
log.error("Error while initializing SNMP", e);
} catch (Exception e){
log.info("SNMP not initialized, SNMP not supported in tenants. Message : " + e.getMessage());
}
// add the Synapse handlers
if (getContext() != null) {
List inflowPhases = ((ConfigurationContext)
getContext()).getAxisConfiguration().getInFlowPhases();
for (Phase inPhase : inflowPhases) {
// we are interested about the Dispatch phase in the inflow
if (PhaseMetadata.PHASE_DISPATCH.equals(inPhase.getPhaseName())) {
for (Handler handler : inPhase.getHandlers()) {
if (MultitenantDispatcher.NAME.equals(handler.getName())) {
return;
}
}
super.start();
}
}
} else {
handleFatal("Couldn't start Synapse, ConfigurationContext not found");
}
}
public SynapseConfiguration createSynapseConfiguration() {
SynapseConfiguration synapseConfig = null;
boolean loadFromRegistry = "true".equals(
getParameter(ServiceBusConstants.LOAD_FROM_REGISTRY));
UserRegistry registry = getRegistry();
Properties properties = SynapsePropertiesLoader.loadSynapseProperties();
if (serverConfigurationInformation.getResolveRoot() != null) {
properties.put(SynapseConstants.RESOLVE_ROOT,
serverConfigurationInformation.getResolveRoot());
}
if (serverConfigurationInformation.getSynapseHome() != null) {
properties.put(SynapseConstants.SYNAPSE_HOME,
serverConfigurationInformation.getSynapseHome());
}
if (loadFromRegistry) {
try {
synapseConfig = loadFromRegistry(registry, properties);
this.synapseConfiguration = synapseConfig;
} catch (Exception e) {
log.error("Error while loading the mediation configuration from " +
"the registry", e);
synapseConfig = null;
}
}
if (synapseConfig == null) {
// If the configuration has not been loaded from the registry load it
// from the file system
log.info("Loading the mediation configuration from the file system");
synapseConfig = super.createSynapseConfiguration();
//save synapse config to registry only if registry persistance enabled
if (ServiceBusConstants.ENABLED.equals(getParameter(ServiceBusConstants.REGISTRY_PERSISTENCE))) {
saveToRegistry(registry, synapseConfig);
}
} else if ("true".equals(getParameter(ServiceBusConstants.SAVE_TO_FILE))) {
// If the configuration was loaded from the registry and the 'saveConfigToFile'
// system property is set we should serialize the current configuration to the
// file system
saveToFileSystem(synapseConfig);
}
return synapseConfig;
}
public void destroySynapseEnvironment() {
// adding the Keep history parameter to every ProxyService to prevent the service
// history being deleted on undeploying services at destroy time
for(ProxyService proxy : synapseConfiguration.getProxyServices()) {
try {
proxy.getAxisService().addParameter(CarbonConstants.KEEP_SERVICE_HISTORY_PARAM, PARAMETER_VALUE_TRUE);
} catch (AxisFault axisFault) {
log.error("Error while accessing the Proxy Service " + proxy.getName()
+ ". Service configuration history might get lost", axisFault);
}
}
// finally call the super logic to do the destroy tasks after persisting
super.destroySynapseEnvironment();
}
private void saveToFileSystem(SynapseConfiguration synapseConfig) {
log.info("Saving the mediation configuration to the file system");
String confPath = synapseConfig.getPathToConfigFile();
MultiXMLConfigurationSerializer serializer = new MultiXMLConfigurationSerializer(confPath);
serializer.serialize(synapseConfig);
}
private void saveToRegistry(UserRegistry registry, SynapseConfiguration synapseConfig) {
if (registry == null) {
log.warn("Unable to persist the mediation configuration to the registry. System " +
"registry is not available.");
return;
}
RegistryBasedSynapseConfigSerializer serializer =
new RegistryBasedSynapseConfigSerializer(registry, currentConfigurationName);
serializer.serializeConfiguration(synapseConfig);
try {
Resource resource;
if (registry.resourceExists(ServiceBusConstants.META_INF_REGISTRY_PATH)) {
resource = registry.get(
ServiceBusConstants.META_INF_REGISTRY_PATH);
} else {
resource = registry.newResource();
}
resource.setProperty(ServiceBusConstants.CONFIGURATION_SERIALIZATION,
ServiceBusConstants.SERIALIZED_TO_REGISTRY);
registry.put(ServiceBusConstants.META_INF_REGISTRY_PATH, resource);
} catch (RegistryException e) {
log.warn("Error ocured while saving the mediation configuration in the registry. " +
"Mediation configuration might get loaded from the file system next time.", e);
}
}
private SynapseConfiguration loadFromRegistry(UserRegistry registry, Properties properties) {
if (registry == null) {
log.warn("Unable to load the mediation configuration from the registry. System " +
"registry is not available.");
return null;
}
if (isInitialStartup(registry)) {
log.warn("Unable to load the mediation configuration from the registry. Mediation " +
"configuration data is not available in the registry.");
return null;
}
String registryFailSafeProperty = getParameter(ServiceBusConstants.REGISTRY_FAIL_SAFE);
boolean registryFailSafe = true;
if ("false".equals(registryFailSafeProperty)) {
registryFailSafe = false;
}
log.info("Loading the mediation configuration from the registry");
RegistryBasedSynapseConfigBuilder builder =
new RegistryBasedSynapseConfigBuilder(registry, currentConfigurationName,
synapseXMLLocation, properties, registryFailSafe);
SynapseConfiguration synapseConfig = builder.getConfiguration();
synapseConfig.setProperties(SynapsePropertiesLoader.loadSynapseProperties());
// Set the Axis2 ConfigurationContext to the SynapseConfiguration
AxisConfiguration axisConfiguration
= ((ConfigurationContext) getContext()).getAxisConfiguration();
synapseConfig.setAxisConfiguration(axisConfiguration);
MessageContextCreatorForAxis2.setSynConfig(synapseConfig);
// set the Synapse configuration into the Axis2 configuration as a parameter.
// Every component that accesses the synapse configuration should get it from
// the axis configuration
Parameter synapseConfigurationParameter = new Parameter(
SynapseConstants.SYNAPSE_CONFIG, synapseConfig);
try {
axisConfiguration.addParameter(synapseConfigurationParameter);
} catch (AxisFault e) {
log.warn("Could not set parameter '" + SynapseConstants.SYNAPSE_CONFIG
+ "' to the Axis2 configuration : " + e.getMessage());
}
addServerIPAndHostEnrties(synapseConfig);
// even though we are starting from the registry still we need to specify
// the xml config file location, just in case for a file export of the
// configuration
synapseConfig.setPathToConfigFile(ServiceBusInitializer
.getServerConfigurationInformation().getSynapseXMLLocation());
return synapseConfig;
}
private UserRegistry getRegistry() {
RegistryService registrySvc = ServiceBusInitializer.getRegistryService();
if (registrySvc == null) {
log.warn("Unable to access the registry service");
return null;
}
try {
return registrySvc.getConfigSystemRegistry();
} catch (RegistryException e) {
log.error("Error while obtaining a system registry instance", e);
return null;
}
}
private void addServerIPAndHostEnrties(SynapseConfiguration configuration) {
String hostName = ServiceBusInitializer.getServerConfigurationInformation().getHostName();
String ipAddress = ServiceBusInitializer.getServerConfigurationInformation().getIpAddress();
if (hostName != null && !"".equals(hostName)) {
Entry entry = new Entry(SynapseConstants.SERVER_HOST);
entry.setValue(hostName);
configuration.addEntry(SynapseConstants.SERVER_HOST, entry);
}
if (ipAddress != null && !"".equals(ipAddress)) {
Entry entry = new Entry(SynapseConstants.SERVER_IP);
entry.setValue(ipAddress);
configuration.addEntry(SynapseConstants.SERVER_IP, entry);
}
}
private boolean isInitialStartup(UserRegistry registry) {
// this logic checks whether this is a initial startup or not
// by reading a registry META-INF resource
try {
if (registry.resourceExists(ServiceBusConstants.META_INF_REGISTRY_PATH)) {
Resource resource = registry.get(ServiceBusConstants.META_INF_REGISTRY_PATH);
if (resource != null && ServiceBusConstants.SERIALIZED_TO_REGISTRY.equals(
resource.getProperty(ServiceBusConstants.CONFIGURATION_SERIALIZATION))) {
return false;
}
}
} catch (RegistryException e) {
log.error("Error while validating mediation configuration data in the registry", e);
}
return true;
}
private String getParameter(String name) {
String value = System.getProperty(name);
if (value != null) {
return value;
}
ServerConfiguration serverConf = ServerConfiguration.getInstance();
return serverConf.getFirstProperty(name);
}
private void handleFatal(String msg) {
log.fatal(msg);
throw new SynapseException(msg);
}
}
