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Apache Unomi Context Server Core Services
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF 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.apache.unomi.services.actions;
import org.apache.commons.beanutils.PropertyUtils;
import org.apache.commons.lang3.StringUtils;
import org.apache.unomi.api.Event;
import org.apache.unomi.api.actions.Action;
import org.apache.unomi.api.actions.ActionDispatcher;
import org.apache.unomi.api.actions.ActionExecutor;
import org.apache.unomi.api.services.EventService;
import org.apache.unomi.scripting.ScriptExecutor;
import org.apache.unomi.metrics.MetricAdapter;
import org.apache.unomi.metrics.MetricsService;
import org.osgi.framework.BundleContext;
import org.osgi.framework.ServiceReference;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.lang.reflect.InvocationTargetException;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
public class ActionExecutorDispatcher {
private static final Logger logger = LoggerFactory.getLogger(ActionExecutorDispatcher.class.getName());
private static final String VALUE_NAME_SEPARATOR = "::";
private final Map valueExtractors = new HashMap<>(11);
private Map executors = new ConcurrentHashMap<>();
private MetricsService metricsService;
private Map actionDispatchers = new ConcurrentHashMap<>();
private BundleContext bundleContext;
private ScriptExecutor scriptExecutor;
public void setMetricsService(MetricsService metricsService) {
this.metricsService = metricsService;
}
public void setBundleContext(BundleContext bundleContext) {
this.bundleContext = bundleContext;
}
public void setScriptExecutor(ScriptExecutor scriptExecutor) {
this.scriptExecutor = scriptExecutor;
}
public ActionExecutorDispatcher() {
valueExtractors.put("profileProperty", new ValueExtractor() {
@Override
public Object extract(String valueAsString, Event event) throws IllegalAccessException, NoSuchMethodException, InvocationTargetException {
return PropertyUtils.getProperty(event.getProfile(), "properties." + valueAsString);
}
});
valueExtractors.put("simpleProfileProperty", new ValueExtractor() {
@Override
public Object extract(String valueAsString, Event event) throws IllegalAccessException, NoSuchMethodException, InvocationTargetException {
return event.getProfile().getProperty(valueAsString);
}
});
valueExtractors.put("sessionProperty", new ValueExtractor() {
@Override
public Object extract(String valueAsString, Event event) throws IllegalAccessException, NoSuchMethodException, InvocationTargetException {
return PropertyUtils.getProperty(event.getSession(), "properties." + valueAsString);
}
});
valueExtractors.put("simpleSessionProperty", new ValueExtractor() {
@Override
public Object extract(String valueAsString, Event event) throws IllegalAccessException, NoSuchMethodException, InvocationTargetException {
return event.getSession().getProperty(valueAsString);
}
});
valueExtractors.put("eventProperty", new ValueExtractor() {
@Override
public Object extract(String valueAsString, Event event) throws IllegalAccessException, NoSuchMethodException, InvocationTargetException {
return PropertyUtils.getProperty(event, valueAsString);
}
});
valueExtractors.put("simpleEventProperty", new ValueExtractor() {
@Override
public Object extract(String valueAsString, Event event) throws IllegalAccessException, NoSuchMethodException, InvocationTargetException {
return event.getProperty(valueAsString);
}
});
valueExtractors.put("script", new ValueExtractor() {
@Override
public Object extract(String valueAsString, Event event) throws IllegalAccessException, NoSuchMethodException, InvocationTargetException {
return executeScript(valueAsString, event);
}
});
}
public Action getContextualAction(Action action, Event event) {
if (!hasContextualParameter(action.getParameterValues())) {
return action;
}
Map values = parseMap(event, action.getParameterValues());
Action n = new Action(action.getActionType());
n.setParameterValues(values);
return n;
}
@SuppressWarnings("unchecked")
private Map parseMap(Event event, Map map) {
Map values = new HashMap<>();
for (Map.Entry entry : map.entrySet()) {
Object value = entry.getValue();
if (value instanceof String) {
String s = (String) value;
try {
// check if we have special values
if (s.contains(VALUE_NAME_SEPARATOR)) {
final String valueType = StringUtils.substringBefore(s, VALUE_NAME_SEPARATOR);
final String valueAsString = StringUtils.substringAfter(s, VALUE_NAME_SEPARATOR);
final ValueExtractor extractor = valueExtractors.get(valueType);
if (extractor != null) {
value = extractor.extract(valueAsString, event);
}
}
} catch (UnsupportedOperationException e) {
throw e;
} catch (Exception e) {
throw new UnsupportedOperationException(e);
}
} else if (value instanceof Map) {
value = parseMap(event, (Map) value);
}
values.put(entry.getKey(), value);
}
return values;
}
@SuppressWarnings("unchecked")
private boolean hasContextualParameter(Map values) {
for (Map.Entry entry : values.entrySet()) {
Object value = entry.getValue();
if (value instanceof String) {
String s = (String) value;
if (s.contains(VALUE_NAME_SEPARATOR) && valueExtractors.containsKey(StringUtils.substringBefore(s, VALUE_NAME_SEPARATOR))) {
return true;
}
} else if (value instanceof Map) {
if (hasContextualParameter((Map) value)) {
return true;
}
}
}
return false;
}
public int execute(Action action, Event event) {
String actionKey = action.getActionType().getActionExecutor();
if (actionKey == null) {
throw new UnsupportedOperationException("No service defined for : " + action.getActionType());
}
int colonPos = actionKey.indexOf(":");
if (colonPos > 0) {
String actionPrefix = actionKey.substring(0, colonPos);
String actionName = actionKey.substring(colonPos+1);
ActionDispatcher actionDispatcher = actionDispatchers.get(actionPrefix);
if (actionDispatcher == null) {
logger.warn("Couldn't find any action dispatcher for prefix '{}', action {} won't execute !", actionPrefix, actionKey);
}
actionDispatcher.execute(action, event, actionName);
} else if (executors.containsKey(actionKey)) {
ActionExecutor actionExecutor = executors.get(actionKey);
try {
return new MetricAdapter(metricsService, this.getClass().getName() + ".action." + actionKey) {
@Override
public Integer execute(Object... args) throws Exception {
return actionExecutor.execute(getContextualAction(action, event), event);
}
}.runWithTimer();
} catch (Exception e) {
logger.error("Error executing action with key=" + actionKey, e);
}
}
return EventService.NO_CHANGE;
}
private interface ValueExtractor {
Object extract(String valueAsString, Event event) throws IllegalAccessException, NoSuchMethodException, InvocationTargetException;
}
public void bindExecutor(ServiceReference actionExecutorServiceReference) {
ActionExecutor actionExecutor = bundleContext.getService(actionExecutorServiceReference);
executors.put(actionExecutorServiceReference.getProperty("actionExecutorId").toString(), actionExecutor);
}
public void unbindExecutor(ServiceReference actionExecutorServiceReference) {
if (actionExecutorServiceReference == null) {
return;
}
executors.remove(actionExecutorServiceReference.getProperty("actionExecutorId").toString());
}
public void bindDispatcher(ServiceReference actionDispatcherServiceReference) {
ActionDispatcher actionDispatcher = bundleContext.getService(actionDispatcherServiceReference);
actionDispatchers.put(actionDispatcher.getPrefix(), actionDispatcher);
}
public void unbindDispatcher(ServiceReference actionDispatcherServiceReference) {
if (actionDispatcherServiceReference == null) {
return;
}
ActionDispatcher actionDispatcher = bundleContext.getService(actionDispatcherServiceReference);
if (actionDispatcher != null) {
actionDispatchers.remove(actionDispatcher.getPrefix());
}
}
protected Object executeScript(String script, Event event) {
Map context = new HashMap<>();
context.put("event", event);
context.put("session", event.getSession());
context.put("profile", event.getProfile());
return scriptExecutor.execute(script, context);
}
}
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