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139 changes: 139 additions & 0 deletions
139
app/gateway/src/main/java/org/apache/camel/workshop/gateway/GatewayRoutes.java
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,139 @@ | ||
| package org.apache.camel.workshop.gateway; | ||
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| import org.apache.camel.Exchange; | ||
| import org.apache.camel.builder.RouteBuilder; | ||
| import org.apache.camel.component.caffeine.CaffeineConstants; | ||
| import org.apache.camel.http.common.HttpMethods; | ||
| import org.apache.camel.impl.saga.InMemorySagaService; | ||
| import org.apache.camel.model.dataformat.JsonLibrary; | ||
| import org.springframework.stereotype.Component; | ||
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| import java.util.Collections; | ||
| import java.util.List; | ||
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| @Component | ||
| public class GatewayRoutes extends RouteBuilder { | ||
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| @Override | ||
| public void configure() throws Exception { | ||
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| restConfiguration() | ||
| .component("servlet") | ||
| .enableCORS(true); | ||
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| getContext().addService(new InMemorySagaService(), true); | ||
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| /* | ||
| * Proxied requests | ||
| */ | ||
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| rest().get("/payments") | ||
| .route() | ||
| .to("undertow:http://{{credit.service}}/api/payments"); | ||
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| rest().get("/purchases") | ||
| .route() | ||
| .to("undertow:http://{{inventory.service}}/api/purchases"); | ||
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| /* | ||
| * Items | ||
| */ | ||
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| rest().get("/items") | ||
| .route() | ||
| .to("undertow:http://{{inventory.service}}/api/items") | ||
| .unmarshal().json(JsonLibrary.Jackson, Catalog.class) | ||
| .enrichWith("direct:recommendationHystrix") | ||
| .body(Catalog.class, List.class, this::recommend) | ||
| .marshal().json(JsonLibrary.Jackson); | ||
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| /* | ||
| * Recommendations | ||
| */ | ||
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| from("direct:recommendationHystrix") | ||
| .hystrix() | ||
| .to("direct:recommendation") | ||
| .setHeader(CaffeineConstants.ACTION, constant(CaffeineConstants.ACTION_PUT)) | ||
| .to("caffeine-cache:global?key=recommendation") | ||
| .onFallback() | ||
| .setHeader(CaffeineConstants.ACTION, constant(CaffeineConstants.ACTION_GET)) | ||
| .to("caffeine-cache:global?key=recommendation") | ||
| .choice() | ||
| .when(header("CamelCaffeineActionHasResult").isNotEqualTo(true)) | ||
| .setBody(constant(Collections.emptyList())) | ||
| .end() | ||
| .end(); | ||
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| from("direct:recommendation") | ||
| .setHeader(Exchange.HTTP_METHOD, constant(HttpMethods.GET)) | ||
| .to("undertow:http://{{recommendation.service}}/api/recommendations") | ||
| .unmarshal().json(JsonLibrary.Jackson, List.class); | ||
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| /* | ||
| * Orders | ||
| */ | ||
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| rest().post("/orders") | ||
| .type(Order.class) | ||
| .route() | ||
| .saga() | ||
| .compensation("direct:cancelOrder") | ||
| .option("order", simple("${body}")) | ||
| .unmarshal().json(JsonLibrary.Jackson, Order.class) | ||
| .to("bean-validator:validateOrder") | ||
| .multicast().parallelProcessing() | ||
| .to("direct:payOrder") | ||
| .to("direct:purchaseOrderItems") | ||
| .end() | ||
| .marshal().json(JsonLibrary.Jackson) | ||
| .end(); | ||
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| from("direct:payOrder") | ||
| .setBody().body(Order.class, this::createPayment) | ||
| .marshal().json(JsonLibrary.Jackson) | ||
| .to("undertow:http://{{credit.service}}/api/payments"); | ||
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| from("direct:purchaseOrderItems") | ||
| .setHeader("reference", simple("${body.reference}")) | ||
| .split().simple("${body.items}").parallelProcessing() | ||
| .toD("undertow:http://{{inventory.service}}/api/purchases/${header.reference}/items/${body.id}?amount=${body.amount}") | ||
| .end(); | ||
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| from("direct:cancelOrder") | ||
| .setBody(header("order")).convertBodyTo(String.class) | ||
| .unmarshal().json(JsonLibrary.Jackson, Order.class) | ||
| .setHeader(Exchange.HTTP_METHOD, constant(HttpMethods.DELETE)) | ||
| .multicast().parallelProcessing() | ||
| .toD("undertow:http://{{credit.service}}/api/payments/${body.reference}") | ||
| .toD("undertow:http://{{inventory.service}}/api/purchases/${body.reference}"); | ||
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| } | ||
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| private Payment createPayment(Order order) { | ||
| Payment payment = new Payment(); | ||
| payment.setUser(order.getUser()); | ||
| payment.setReference(order.getReference()); | ||
| payment.setAmount(order.getPrice()); | ||
| return payment; | ||
| } | ||
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| private Catalog recommend(Catalog catalog, List<String> recomm) { | ||
| if (recomm != null && catalog != null && catalog.getItems() != null) { | ||
| for (String recommItem : recomm) { | ||
| Item item = catalog.getItems().get(recommItem); | ||
| if (item != null) { | ||
| item.setRecommended(true); | ||
| } | ||
| } | ||
| } | ||
| return catalog; | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,11 +1,13 @@ | ||
| camel.component.servlet.mapping.context-path=/api/* | ||
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| inventory.host=localhost | ||
| inventory.port=8081 | ||
| inventory.service=${inventory.host}:${inventory.port} | ||
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| payment.host=localhost | ||
| payment.port=8082 | ||
| credit.host=localhost | ||
| credit.port=8082 | ||
| credit.service=${credit.host}:${credit.port} | ||
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| recommendation.host=localhost | ||
| recommendation.port=8083 | ||
| recommendation.port=8083 | ||
| recommendation.service=${recommendation.host}:${recommendation.port} |
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