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May 10, 2022 16:00
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| package org.openrewrite.java.spring; | |
| import org.openrewrite.ExecutionContext; | |
| import org.openrewrite.Recipe; | |
| import org.openrewrite.TreeVisitor; | |
| import org.openrewrite.java.*; | |
| import org.openrewrite.java.search.UsesMethod; | |
| import org.openrewrite.java.tree.J; | |
| public class WebClientMaxConnections extends Recipe { | |
| private static final MethodMatcher httpClientCreate = new MethodMatcher( | |
| "reactor.netty.http.client.HttpClient create()"); | |
| @Override | |
| public String getDisplayName() { | |
| return "WebClient max connection count"; | |
| } | |
| @Override | |
| protected TreeVisitor<?, ExecutionContext> getSingleSourceApplicableTest() { | |
| return new UsesMethod<>(httpClientCreate); | |
| } | |
| @Override | |
| protected JavaVisitor<ExecutionContext> getVisitor() { | |
| return new JavaIsoVisitor<>() { | |
| private final JavaTemplate optimize = JavaTemplate.builder(this::getCursor, | |
| "ConnectionProvider.builder(\"connectionProvider\").maxConnections(500).build()") | |
| .imports("reactor.netty.resources.ConnectionProvider") | |
| .javaParser(() -> JavaParser.fromJavaVersion() | |
| .classpath("reactor-netty-http", "reactor-netty-core", "reactor-core").build()) | |
| .build(); | |
| @Override | |
| public J.MethodInvocation visitMethodInvocation(J.MethodInvocation method, ExecutionContext ctx) { | |
| J.MethodInvocation m = super.visitMethodInvocation(method, ctx); | |
| if (httpClientCreate.matches(m)) { | |
| m = m.withTemplate(optimize, m.getCoordinates().replaceArguments()); | |
| maybeAddImport("reactor.netty.resources.ConnectionProvider"); | |
| } | |
| return m; | |
| } | |
| }; | |
| } | |
| } |
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| package org.openrewrite.java.spring.org.openrewrite.java.spring | |
| import org.junit.jupiter.api.Test | |
| import org.openrewrite.java.JavaParser | |
| import org.openrewrite.java.spring.WebClientMaxConnections | |
| import org.openrewrite.test.RecipeSpec | |
| import org.openrewrite.test.RewriteTest | |
| class WebClientMaxConnectionsTest : RewriteTest { | |
| override fun defaults(spec: RecipeSpec) { | |
| spec.recipe(WebClientMaxConnections()) | |
| spec.parser(JavaParser.fromJavaVersion() | |
| .logCompilationWarningsAndErrors(true) | |
| .classpath("reactor-netty-http", "reactor-netty-core").build()) | |
| } | |
| @Test | |
| fun webclientOptimization() = rewriteRun( | |
| java( | |
| """ | |
| import reactor.netty.http.client.HttpClient; | |
| class Test { | |
| void test() { | |
| HttpClient httpClient = HttpClient.create(); | |
| } | |
| } | |
| """, | |
| """ | |
| import reactor.netty.http.client.HttpClient; | |
| import reactor.netty.resources.ConnectionProvider; | |
| class Test { | |
| void test() { | |
| HttpClient httpClient = HttpClient.create(ConnectionProvider.builder("connectionProvider").maxConnections(500).build()); | |
| } | |
| } | |
| """ | |
| ) | |
| ) | |
| } |
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