io.syndesis.integration.runtime.IntegrationRouteBuilder Maven / Gradle / Ivy
/*
* Copyright (C) 2016 Red Hat, Inc.
*
* 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.syndesis.integration.runtime;
import java.io.IOException;
import java.io.InputStream;
import java.net.URISyntaxException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import java.util.Set;
import io.syndesis.common.model.Split;
import io.syndesis.common.model.action.ConnectorAction;
import io.syndesis.common.model.action.ConnectorDescriptor;
import io.syndesis.common.model.action.StepAction;
import io.syndesis.common.model.integration.Integration;
import io.syndesis.common.model.integration.Scheduler;
import io.syndesis.common.model.integration.Step;
import io.syndesis.common.model.integration.StepKind;
import io.syndesis.common.util.Json;
import io.syndesis.common.util.KeyGenerator;
import io.syndesis.integration.runtime.capture.OutMessageCaptureProcessor;
import io.syndesis.integration.runtime.handlers.ConnectorStepHandler;
import io.syndesis.integration.runtime.handlers.DataMapperStepHandler;
import io.syndesis.integration.runtime.handlers.EndpointStepHandler;
import io.syndesis.integration.runtime.handlers.ExpressionFilterStepHandler;
import io.syndesis.integration.runtime.handlers.ExtensionStepHandler;
import io.syndesis.integration.runtime.handlers.LogStepHandler;
import io.syndesis.integration.runtime.handlers.RuleFilterStepHandler;
import io.syndesis.integration.runtime.handlers.SimpleEndpointStepHandler;
import io.syndesis.integration.runtime.handlers.SplitStepHandler;
import io.syndesis.integration.runtime.logging.ActivityTracker;
import io.syndesis.integration.runtime.logging.ActivityTrackingPolicy;
import io.syndesis.integration.runtime.logging.IntegrationLoggingConstants;
import org.apache.camel.CamelContext;
import org.apache.camel.builder.RouteBuilder;
import org.apache.camel.model.ExpressionNode;
import org.apache.camel.model.ModelHelper;
import org.apache.camel.model.PipelineDefinition;
import org.apache.camel.model.ProcessorDefinition;
import org.apache.camel.model.RouteDefinition;
import org.apache.camel.model.RoutesDefinition;
import org.apache.camel.runtimecatalog.RuntimeCamelCatalog;
import org.apache.camel.spi.RoutePolicy;
import org.apache.camel.util.ObjectHelper;
import org.apache.camel.util.ResourceHelper;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* A Camel {@link RouteBuilder} which maps an Integration to Camel routes
*/
@SuppressWarnings("PMD")
public class IntegrationRouteBuilder extends RouteBuilder {
private static final Logger LOGGER = LoggerFactory.getLogger(IntegrationRouteBuilder.class);
private final String configurationUri;
private final List stepHandlerList;
private final Set resources;
private final ActivityTracker activityTracker;
public IntegrationRouteBuilder(String configurationUri, Collection handlers) {
this(configurationUri, handlers, null);
}
public IntegrationRouteBuilder(String configurationUri, Collection handlers, ActivityTracker activityTracker) {
this.configurationUri = configurationUri;
this.resources = new HashSet<>();
this.stepHandlerList = new ArrayList<>();
this.stepHandlerList.add(new ConnectorStepHandler());
this.stepHandlerList.add(new EndpointStepHandler());
this.stepHandlerList.add(new SimpleEndpointStepHandler());
this.stepHandlerList.add(new DataMapperStepHandler());
this.stepHandlerList.add(new ExpressionFilterStepHandler());
this.stepHandlerList.add(new RuleFilterStepHandler());
this.stepHandlerList.add(new ExtensionStepHandler());
this.stepHandlerList.add(new SplitStepHandler());
this.stepHandlerList.add(new LogStepHandler());
this.stepHandlerList.addAll(handlers);
this.activityTracker = activityTracker;
}
protected Integration loadIntegration() throws IOException {
final Integration integration;
try (InputStream is = ResourceHelper.resolveResourceAsInputStream(getContext().getClassResolver(), configurationUri)) {
if (is != null) {
LOGGER.info("Loading integration from: {}", configurationUri);
integration = Json.reader().forType(Integration.class).readValue(is);
} else {
throw new IllegalStateException("Unable to load deployment: " + configurationUri);
}
}
return integration;
}
@Override
public void configure() throws Exception {
final Integration integration = loadIntegration();
final List steps = Collections.unmodifiableList(integration.getSteps());
if (steps.isEmpty()) {
return;
}
ProcessorDefinition parent = configureRouteScheduler(integration);
for (int i = 0; i < steps.size(); i++) {
final Step step = steps.get(i);
final String stepIndex = Integer.toString(i + 1);
final String stepId = step.getId().orElseGet(KeyGenerator::createKey);
final IntegrationStepHandler handler = findHandler(step);
// Load route fragments eventually defined by extensions.
loadFragments(step);
if (parent == null) {
if (!(handler instanceof IntegrationStepHandler.Consumer)) {
throw new IllegalStateException("The handler for step kind " + step.getKind() + " is not a consumer");
}
Optional definition = handler.handle(step, null, this, stepIndex);
if (definition.isPresent()) {
parent = definition.get();
parent = configureRouteDefinition(parent, stepId);
parent = parent.setHeader(IntegrationLoggingConstants.STEP_ID, constant(stepId));
parent = configureConnectorSplit(step, parent, stepIndex).orElse(parent);
parent = parent.process(OutMessageCaptureProcessor.INSTANCE);
}
} else {
parent = configureRouteDefinition(parent, stepId);
if (i > 0) {
// If parent is not null and this is the first step, a scheduler
// has been created as route initiator so d'ont include the
// first step in activity logging.
parent = createPipeline(parent, stepId);
}
parent = handler.handle(step, parent, this, stepIndex).orElse(parent);
Optional splitStep = getConnectorSplitAsStep(step);
if (splitStep.isPresent()) {
if (i > 0) {
if (parent instanceof PipelineDefinition) {
parent = parent.end();
} else if (parent instanceof ExpressionNode) {
parent = parent.endParent();
}
}
parent = new SplitStepHandler().handle(splitStep.get(), parent, this, stepIndex).orElse(parent);
parent = parent.setHeader(IntegrationLoggingConstants.STEP_ID, constant(stepId));
parent = parent.process(new OutMessageCaptureProcessor());
} else {
if (parent instanceof PipelineDefinition) {
parent = parent.process(OutMessageCaptureProcessor.INSTANCE);
parent = parent.end();
} else if (parent instanceof ExpressionNode) {
parent = parent.process(OutMessageCaptureProcessor.INSTANCE);
parent = parent.endParent();
} else {
parent = parent.process(OutMessageCaptureProcessor.INSTANCE);
}
}
}
}
}
private ProcessorDefinition configureRouteDefinition(ProcessorDefinition definition, String stepId) {
if (definition instanceof RouteDefinition) {
final RouteDefinition rd = (RouteDefinition)definition;
final List rp = rd.getRoutePolicies();
if (rp != null && rp.stream().anyMatch(ActivityTrackingPolicy.class::isInstance)) {
// Route has already been configured so no need to go ahead
return definition;
}
rd.id(stepId);
rd.routePolicy(new ActivityTrackingPolicy(activityTracker));
rd.getInputs().get(0).id(stepId);
}
return definition;
}
private ProcessorDefinition createPipeline(ProcessorDefinition parent, String stepId) {
return parent.pipeline()
.id(String.format("step:%s", stepId))
.setHeader(IntegrationLoggingConstants.STEP_ID, constant(stepId));
}
/**
* If the integration has a scheduler, start the route with a timer or quartz2
* endpoint.
*/
private ProcessorDefinition configureRouteScheduler(Integration integration) throws URISyntaxException {
if (integration.getScheduler().isPresent()) {
Scheduler scheduler = integration.getScheduler().get();
// We now support simple timer only, cron support will be supported
// later on.
if (scheduler.isTimer()) {
Map properties = new HashMap<>();
properties.put("timerName", "integration");
properties.put("period", scheduler.getExpression());
final RuntimeCamelCatalog catalog = getContext().getRuntimeCamelCatalog();
final String uri = catalog.asEndpointUri("timer", properties, false);
RouteDefinition route = this.from(uri);
route.getInputs().get(0).setId("integration-scheduler");
integration.getId().ifPresent(route::setId);
return route;
} else {
throw new IllegalArgumentException("Unsupported scheduler type: " + scheduler.getType());
}
}
return null;
}
private Optional getConnectorSplitAsStep(Step step) {
if (step.getAction().filter(ConnectorAction.class::isInstance).isPresent()) {
final ConnectorAction action = step.getAction().filter(ConnectorAction.class::isInstance).map(ConnectorAction.class::cast).get();
final ConnectorDescriptor descriptor = action.getDescriptor();
if (descriptor.getSplit().isPresent()) {
final Split split = descriptor.getSplit().get();
final Step.Builder splitBuilder = new Step.Builder().stepKind(StepKind.split);
split.getLanguage().ifPresent(s -> splitBuilder.putConfiguredProperty("language", s));
split.getExpression().ifPresent(s -> splitBuilder.putConfiguredProperty("expression", s));
return Optional.of(splitBuilder.build());
}
}
return Optional.empty();
}
private Optional configureConnectorSplit(Step step, ProcessorDefinition route, String index) {
if (step.getAction().filter(ConnectorAction.class::isInstance).isPresent()) {
final ConnectorAction action = step.getAction().filter(ConnectorAction.class::isInstance).map(ConnectorAction.class::cast).get();
final ConnectorDescriptor descriptor = action.getDescriptor();
if (descriptor.getSplit().isPresent()) {
final Split split = descriptor.getSplit().get();
final Step.Builder splitBuilder = new Step.Builder().stepKind(StepKind.split);
split.getLanguage().ifPresent(s -> splitBuilder.putConfiguredProperty("language", s));
split.getExpression().ifPresent(s -> splitBuilder.putConfiguredProperty("expression", s));
return new SplitStepHandler().handle(
splitBuilder.build(),
route,
this,
index);
}
}
return Optional.empty();
}
private void loadFragments(Step step) {
if (StepKind.extension != step.getStepKind()) {
return;
}
final StepAction action = step.getAction().filter(StepAction.class::isInstance).map(StepAction.class::cast).get();
if (action.getDescriptor().getKind() == StepAction.Kind.ENDPOINT) {
final CamelContext context = getContext();
final String resource = action.getDescriptor().getResource();
if (ObjectHelper.isNotEmpty(resource) && resources.add(resource)) {
final Object instance = mandatoryLoadResource(context, resource);
final RoutesDefinition definitions = mandatoryConvertToRoutesDefinition(resource, instance);
LOGGER.debug("Resolved resource: {} as {}", resource, instance.getClass());
try {
context.addRouteDefinitions(definitions.getRoutes());
} catch (Exception e) {
throw new IllegalStateException(e);
}
}
}
}
// Visibility changed for test purpose.
protected IntegrationStepHandler findHandler(Step step) {
for (int i = 0; i < stepHandlerList.size(); i++) {
IntegrationStepHandler handler = stepHandlerList.get(i);
if (handler.canHandle(step)) {
LOGGER.debug("Step kind: {}, handler: {}", step.getStepKind(), handler.getClass().getName());
return handler;
}
}
throw new IllegalStateException("Unsupported step kind: " + step.getStepKind());
}
private Object mandatoryLoadResource(CamelContext context, String resource) {
Object instance = null;
if (resource.startsWith("classpath:")) {
try (InputStream is = ResourceHelper.resolveMandatoryResourceAsInputStream(context, resource)) {
instance = ModelHelper.loadRoutesDefinition(context, is);
} catch (Exception e) {
throw new IllegalArgumentException(e);
}
} else if (resource.startsWith("class:")) {
Class type = context.getClassResolver().resolveClass(resource.substring("class:".length()));
instance = context.getInjector().newInstance(type);
} else if (resource.startsWith("bean:")) {
instance = context.getRegistry().lookupByName(resource.substring("bean:".length()));
}
if (instance == null) {
throw new IllegalArgumentException("Unable to resolve resource: " + resource);
}
return instance;
}
private RoutesDefinition mandatoryConvertToRoutesDefinition(String resource, Object instance) {
final RoutesDefinition definitions;
if (instance instanceof RoutesDefinition) {
definitions = (RoutesDefinition)instance;
} else if (instance instanceof RouteDefinition) {
definitions = new RoutesDefinition();
definitions.route((RouteDefinition)instance);
} else if (instance instanceof RouteBuilder) {
RouteBuilder builder = (RouteBuilder)instance;
try {
builder.configure();
definitions = builder.getRouteCollection();
} catch (Exception e) {
LOGGER.warn("Unable to configure resource: " + resource, e);
throw ObjectHelper.wrapRuntimeCamelException(e);
}
} else {
throw new IllegalArgumentException("Unable to convert instance: " + instance);
}
return definitions;
}
}
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