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/*
 * Copyright © 2014-2017 EntIT Software LLC, a Micro Focus company (L.P.)
 *
 * Licensed 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 io.cloudslang.schema;

import io.cloudslang.engine.node.services.StubQueueConfigurationDataServiceImpl;
import io.cloudslang.runtime.impl.python.executor.services.PythonExecutorLifecycleManagerServiceImpl;
import io.cloudslang.runtime.impl.python.executor.services.PythonExecutorProcessInspectorLinuxImpl;
import io.cloudslang.runtime.impl.python.executor.services.PythonExecutorProcessInspectorWindowsImpl;
import io.cloudslang.runtime.impl.python.executor.services.PythonExecutorProcessManagerServiceImpl;
import io.cloudslang.runtime.impl.python.executor.services.stubs.StubPythonExecutorCommunicationServiceImpl;
import io.cloudslang.runtime.impl.python.executor.services.stubs.StubPythonExecutorConfigurationDataServiceImpl;
import io.cloudslang.runtime.impl.sequential.DefaultSequentialExecutionServiceImpl;
import io.cloudslang.score.events.EventBusImpl;
import io.cloudslang.score.events.FastEventBusImpl;
import io.cloudslang.worker.execution.reflection.ReflectionAdapterImpl;
import io.cloudslang.worker.execution.services.ExecutionServiceImpl;
import io.cloudslang.worker.execution.services.ScoreRobotAvailabilityServiceImpl;
import io.cloudslang.worker.execution.services.SessionDataHandlerImpl;
import io.cloudslang.worker.execution.services.StubAplsLicensingServiceImpl;
import io.cloudslang.worker.execution.services.StubExecutionPostconditionService;
import io.cloudslang.worker.execution.services.StubExecutionPreconditionService;
import io.cloudslang.worker.management.WorkerConfigurationServiceImpl;
import io.cloudslang.worker.management.WorkerRegistration;
import io.cloudslang.worker.management.monitor.ScheduledWorkerLoadMonitor;
import io.cloudslang.worker.management.monitor.WorkerMonitorsImpl;
import io.cloudslang.worker.management.monitor.WorkerStateUpdateServiceImpl;
import io.cloudslang.worker.management.queue.WorkerQueueDetailsContainer;
import io.cloudslang.worker.management.services.InBuffer;
import io.cloudslang.worker.management.services.OutboundBufferImpl;
import io.cloudslang.worker.management.services.RetryTemplate;
import io.cloudslang.worker.management.services.SimpleExecutionRunnableFactory;
import io.cloudslang.worker.management.services.SynchronizationManagerImpl;
import io.cloudslang.worker.management.services.WorkerConfigurationUtils;
import io.cloudslang.worker.management.services.WorkerExecutionMonitorServiceImpl;
import io.cloudslang.worker.management.services.WorkerManager;
import io.cloudslang.worker.management.services.WorkerManagerMBean;
import io.cloudslang.worker.management.services.WorkerRecoveryManagerImpl;
import io.cloudslang.worker.management.services.WorkerVersionServiceImpl;
import io.cloudslang.worker.monitor.metrics.DiskWriteUtilizationService;
import io.cloudslang.worker.monitor.metrics.DiskReadUtilizationService;
import io.cloudslang.worker.monitor.metrics.WorkerThreadUtilization;
import io.cloudslang.worker.monitor.metrics.MemoryUtilizationService;
import io.cloudslang.worker.monitor.metrics.CpuUtilizationService;
import io.cloudslang.worker.monitor.metrics.HeapUtilizationService;
import io.cloudslang.worker.monitor.PerformanceMetricsCollector;
import io.cloudslang.worker.monitor.service.WorkerMetricsServiceImpl;
import io.cloudslang.worker.monitor.mbean.WorkerMetricsMBean;
import org.apache.commons.lang3.SystemUtils;
import org.springframework.beans.factory.support.AbstractBeanDefinition;
import org.springframework.beans.factory.support.BeanDefinitionBuilder;
import org.springframework.beans.factory.xml.AbstractBeanDefinitionParser;
import org.springframework.beans.factory.xml.ParserContext;
import org.springframework.beans.factory.xml.XmlBeanDefinitionReader;
import org.springframework.util.StringUtils;
import org.springframework.util.xml.DomUtils;
import org.w3c.dom.Element;

import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import static java.lang.Boolean.FALSE;

/**
 * @since 21/01/2014
 */
public class WorkerBeanDefinitionParser extends AbstractBeanDefinitionParser {

	private Map,String> beans = new HashMap,String>(){{
		put(WorkerManager.class, "workerManager");
		put(EventBusImpl.class, null);
		put(FastEventBusImpl.class, "consumptionFastEventBus");
		put(ExecutionServiceImpl.class, "agent");
		put(InBuffer.class, null);
		put(WorkerConfigurationUtils.class, null);
		put(WorkerStateUpdateServiceImpl.class, null);
		put(OutboundBufferImpl.class, "outBuffer");
		put(RetryTemplate.class, null);
		put(SimpleExecutionRunnableFactory.class, null);
		put(WorkerManagerMBean.class, "io.cloudslang.worker.management.services.WorkerManagerMBean");
		put(WorkerMetricsMBean.class, "io.cloudslang.worker.monitor.mbean.WorkerMetricsMBean");
		put(WorkerRecoveryManagerImpl.class, null);
		put(ReflectionAdapterImpl.class, null);
        put(SessionDataHandlerImpl.class, "sessionDataHandler");
		put(SynchronizationManagerImpl.class, null);
        put(WorkerConfigurationServiceImpl.class, "workerConfiguration");
        put(WorkerQueueDetailsContainer.class, "workerQueueDetailsContainer");
		put(PythonExecutorLifecycleManagerServiceImpl.class, "pythonExecutorLifecycleManagerService");
		put(PythonExecutorProcessManagerServiceImpl.class, "pythonExecutorProcessManagerService");
		put(SystemUtils.IS_OS_WINDOWS ? PythonExecutorProcessInspectorWindowsImpl.class : PythonExecutorProcessInspectorLinuxImpl.class,
						"pythonExecutorProcessInspector");

        //Monitors
        put(WorkerExecutionMonitorServiceImpl.class, "workerExecutionMonitorService");
        put(WorkerMonitorsImpl.class, "workerMonitorsImpl");
        put(ScheduledWorkerLoadMonitor.class, "scheduledWorkerLoadMonitor");
		put(CpuUtilizationService.class, "cpuUtilizationService");
		put(DiskReadUtilizationService.class, "diskReadUtilizationService");
		put(DiskWriteUtilizationService.class, "diskWriteUtilizationService");
		put(MemoryUtilizationService.class, "memoryUtilizationService");
		put(PerformanceMetricsCollector.class, "perfMetricCollector");
		put(WorkerMetricsServiceImpl.class, "workerMetricCollectorService");
		put(HeapUtilizationService.class, "heapUtilizationService");
		put(WorkerThreadUtilization.class, "workerThreadUtilization");
	}};

	private List configurationValues = Arrays.asList(
			new ConfValue().NAME("inBufferCapacity").DEFAULT(500),
			new ConfValue().NAME("numberOfExecutionThreads").DEFAULT(20),
			new ConfValue().NAME("maxDeltaBetweenDrains").DEFAULT(100)
	);

	private List schedulerValues = Arrays.asList(
			new ConfValue().NAME("outBufferInterval").DEFAULT(100L),
			new ConfValue().NAME("keepAliveInterval").DEFAULT(10000L),
			new ConfValue().NAME("configRefreshInterval").DEFAULT(1000L),
			new ConfValue().NAME("interruptCanceledInterval").DEFAULT(30000L),
            new ConfValue().NAME("statisticsInterval").DEFAULT(1000L),
            new ConfValue().NAME("scheduledWorkerMonitorInterval").DEFAULT(10000L),
            new ConfValue().NAME("workerMonitorRefreshInterval").DEFAULT(300000L),
			new ConfValue().NAME("scheduledPerfMetricCollectionInterval").DEFAULT(5000L),
			new ConfValue().NAME("scheduledMetricDispatchInterval").DEFAULT(30000L)
	);

	@Override
	protected AbstractBeanDefinition parseInternal(Element element, ParserContext parserContext) {
		registerWorkerUuid(element.getAttribute("uuid"), element.getAttribute("depends-on"), parserContext);
		registerBeans(parserContext);
		registerSpecialBeans(element, parserContext);
		registerConfiguration(DomUtils.getChildElementByTagName(element, "configuration"), parserContext);
		registerScheduler(DomUtils.getChildElementByTagName(element, "scheduler"), parserContext);
		return createRootBeanDefinition();
	}

	private AbstractBeanDefinition createRootBeanDefinition(){
		return BeanDefinitionBuilder.genericBeanDefinition(Object.class).getBeanDefinition();
	}

	private void registerWorkerUuid(String uuid, String dependsOn, ParserContext parserContext) {
		new BeanRegistrator(parserContext)
				.NAME("workerUuid")
				.CLASS(String.class)
				.addConstructorArgValue(uuid)
				.addDependsOn(StringUtils.hasText(dependsOn)? dependsOn.split(","): null)
				.register();
	}

	private void registerBeans(ParserContext parserContext){
		BeanRegistrator beanRegistrator = new BeanRegistrator(parserContext);
		for (Map.Entry,String> entry : beans.entrySet()) {
			beanRegistrator
					.NAME(entry.getValue())
					.CLASS(entry.getKey())
					.register();
		}
	}

	private void registerSpecialBeans(Element element, ParserContext parserContext) {
		if (!"false".equalsIgnoreCase(element.getAttribute("register"))) {
			new BeanRegistrator(parserContext).CLASS(WorkerRegistration.class).register();
		}

		registerWorkerVersionService(element, parserContext);
		registerSequentialExecution(element, parserContext);
		registerRobotAvailabilityService(element, parserContext);
		registerExecutionPreconditionService(element, parserContext);
		registerExecutionPostconditionService(element, parserContext);
		registerQueueConfigurationDataService(element, parserContext);
		registerAplsLicensingService(element, parserContext);
		registerPythonExecutorConfigurationDataService(element, parserContext);
		registerPythonExecutorCommunicationService(element, parserContext);
	}

	private void registerSequentialExecution(Element element, ParserContext parserContext) {
		String registerSequentialExecutionService = element.getAttribute("registerSequentialExecutionService");
		if (!FALSE.toString().equals(registerSequentialExecutionService)) {
			new BeanRegistrator(parserContext)
					.NAME("sequentialExecutionService")
					.CLASS(DefaultSequentialExecutionServiceImpl.class)
					.register();
		}
	}

	private void registerWorkerVersionService(Element element, ParserContext parserContext) {
		String registerWorkerVersionService = element.getAttribute("registerWorkerVersionService");
		if (!FALSE.toString().equals(registerWorkerVersionService)) {
			new BeanRegistrator(parserContext).CLASS(WorkerVersionServiceImpl.class).register();
		}
	}

	private void registerRobotAvailabilityService(Element element, ParserContext parserContext) {
		String registerRobotAvailabilityService = element.getAttribute("registerRobotAvailabilityService");
		if (!FALSE.toString().equals(registerRobotAvailabilityService)) {
			new BeanRegistrator(parserContext)
					.NAME("robotAvailabilityService")
					.CLASS(ScoreRobotAvailabilityServiceImpl.class)
					.register();
		}
	}

	private void registerExecutionPreconditionService(Element element, ParserContext parserContext) {
		String registerPreconditionService = element.getAttribute("registerExecutionPreconditionService");
		if (!FALSE.toString().equals(registerPreconditionService)) {
			new BeanRegistrator(parserContext)
					.NAME("executionPreconditionService")
					.CLASS(StubExecutionPreconditionService.class)
					.register();
		}
	}


	private void registerExecutionPostconditionService(Element element, ParserContext parserContext) {
		String registerPostconditionService = element.getAttribute("registerExecutionPostconditionService");
		if (!FALSE.toString().equals(registerPostconditionService)) {
			new BeanRegistrator(parserContext)
					.NAME("executionPostconditionService")
					.CLASS(StubExecutionPostconditionService.class)
					.register();
		}
	}

	private void registerConfiguration(Element configurationElement, ParserContext parserContext) {
		for (ConfValue configurationValue : configurationValues) {
			configurationValue.register(configurationElement, parserContext);
		}
	}

	private void registerScheduler(Element schedulerElement, ParserContext parserContext){
		for (ConfValue value : schedulerValues) {
			value.register(schedulerElement, parserContext);
		}
		new XmlBeanDefinitionReader(parserContext.getRegistry())
				.loadBeanDefinitions("META-INF/spring/score/context/scoreWorkerSchedulerContext.xml");
	}

	private void registerQueueConfigurationDataService(Element element, ParserContext parserContext) {
		String registerQueueConfigurationDataService = element.getAttribute("registerQueueConfigurationDataService");
		if (!FALSE.toString().equals(registerQueueConfigurationDataService)) {
			new BeanRegistrator(parserContext)
				.NAME("queueConfigurationDataService")
				.CLASS(StubQueueConfigurationDataServiceImpl.class)
				.register();
		}
	}

	private void registerAplsLicensingService(Element element, ParserContext parserContext) {
		String registerAplsLicensingService = element.getAttribute("registerAplsLicensingService");
		if (!FALSE.toString().equals(registerAplsLicensingService)) {
			new BeanRegistrator(parserContext)
					.NAME("aplsLicensingService")
					.CLASS(StubAplsLicensingServiceImpl.class)
					.register();
		}
	}

	private void registerPythonExecutorConfigurationDataService(Element element, ParserContext parserContext) {
		String registerPythonExecutorConfigurationDataService = element.getAttribute("stubPythonExecutorConfigurationDataService");
		if (!FALSE.toString().equals(registerPythonExecutorConfigurationDataService)) {
			new BeanRegistrator(parserContext)
					.NAME("stubPythonExecutorConfigurationDataService")
					.CLASS(StubPythonExecutorConfigurationDataServiceImpl.class)
					.register();
		}
	}

	private void registerPythonExecutorCommunicationService(Element element, ParserContext parserContext) {
		String registerPythonExecutorCommunicationService = element.getAttribute("stubPythonExecutorCommunicationService");
		if (!FALSE.toString().equals(registerPythonExecutorCommunicationService)) {
			new BeanRegistrator(parserContext)
					.NAME("stubPythonExecutorCommunicationService")
					.CLASS(StubPythonExecutorCommunicationServiceImpl.class)
					.register();
		}
	}

	@Override
	protected boolean shouldGenerateId() {
		return true;
	}

}