Bael 776 vert.x and rxjava (#2529)
* Burlap & Hessian server added * Burlap & Hessian client work * Fixed main * Fixed formatting * Spring Remote example based on Burlap & Hessian runs in a JUnit test * Fixed main * Fixed formatting * Spring Remote example based on Burlap & Hessian runs in a JUnit test * Spring Remote example based on Burlap & Hessian runs in a JUnit test * Burlap & Hessian client work * Fixed main * Fixed main * Fixed formatting * Fixed formatting * Spring Remote example based on Burlap & Hessian runs in a JUnit test * Spring Remote example based on Burlap & Hessian runs in a JUnit test * Fixed POM * Vertx / RxJava example * BAEL-776 - Vertx and RxJava * BAEL-776 - Vertx and RxJava
This commit is contained in:
Daniele Demichelis
Grzegorz Piwowarek
parent
7df2635822
commit
4c7f165c7e
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@ -41,3 +41,4 @@ SpringDataInjectionDemo/.mvn/wrapper/maven-wrapper.properties
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spring-call-getters-using-reflection/.mvn/wrapper/maven-wrapper.properties
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spring-check-if-a-property-is-null/.mvn/wrapper/maven-wrapper.properties
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/vertx-and-rxjava/.vertx/
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1
pom.xml
1
pom.xml
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@ -240,6 +240,7 @@
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<module>spring-boot-property-exp</module>
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<module>mockserver</module>
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<module>undertow</module>
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<module>vertx-and-rxjava</module>
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</modules>
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<dependencies>
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@ -0,0 +1,71 @@
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<?xml version="1.0" encoding="UTF-8"?>
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<project xmlns="http://maven.apache.org/POM/4.0.0"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<parent>
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<groupId>com.baeldung</groupId>
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<artifactId>parent-modules</artifactId>
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<version>1.0.0-SNAPSHOT</version>
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</parent>
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<modelVersion>4.0.0</modelVersion>
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<groupId>com.baeldung</groupId>
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<artifactId>vertx-and-rxjava</artifactId>
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<build>
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<plugins>
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<plugin>
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<groupId>org.apache.maven.plugins</groupId>
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<artifactId>maven-compiler-plugin</artifactId>
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<configuration>
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<source>1.8</source>
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<target>1.8</target>
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</configuration>
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</plugin>
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</plugins>
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</build>
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<dependencies>
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<dependency>
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<groupId>io.vertx</groupId>
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<artifactId>vertx-rx-java2</artifactId>
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<version>3.5.0.Beta1</version>
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</dependency>
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<dependency>
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<groupId>io.vertx</groupId>
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<artifactId>vertx-core</artifactId>
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<version>3.5.0.Beta1</version>
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</dependency>
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<dependency>
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<groupId>io.vertx</groupId>
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<artifactId>vertx-unit</artifactId>
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<version>3.5.0.Beta1</version>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>junit</groupId>
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<artifactId>junit</artifactId>
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<version>4.12</version>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>org.slf4j</groupId>
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<artifactId>slf4j-api</artifactId>
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<version>1.7.25</version>
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</dependency>
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<dependency>
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<groupId>ch.qos.logback</groupId>
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<artifactId>logback-classic</artifactId>
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<version>1.2.3</version>
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</dependency>
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<dependency>
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<groupId>junit</groupId>
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<artifactId>junit</artifactId>
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<version>4.12</version>
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</dependency>
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</dependencies>
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</project>
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@ -0,0 +1,71 @@
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<?xml version="1.0" encoding="UTF-8"?>
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<project xmlns="http://maven.apache.org/POM/4.0.0"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<parent>
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<groupId>com.baeldung</groupId>
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<artifactId>parent-modules</artifactId>
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<version>1.0.0-SNAPSHOT</version>
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</parent>
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<modelVersion>4.0.0</modelVersion>
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<groupId>com.baeldung</groupId>
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<artifactId>vertx-and-rxjava</artifactId>
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<build>
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<plugins>
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<plugin>
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<groupId>org.apache.maven.plugins</groupId>
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<artifactId>maven-compiler-plugin</artifactId>
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<configuration>
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<source>1.8</source>
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<target>1.8</target>
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</configuration>
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</plugin>
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</plugins>
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</build>
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<dependencies>
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<dependency>
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<groupId>io.vertx</groupId>
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<artifactId>vertx-rx-java2</artifactId>
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<version>3.5.0.Beta1</version>
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</dependency>
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<dependency>
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<groupId>io.vertx</groupId>
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<artifactId>vertx-core</artifactId>
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<version>3.5.0.Beta1</version>
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</dependency>
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<dependency>
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<groupId>io.vertx</groupId>
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<artifactId>vertx-unit</artifactId>
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<version>3.5.0.Beta1</version>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>junit</groupId>
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<artifactId>junit</artifactId>
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<version>4.12</version>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>org.slf4j</groupId>
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<artifactId>slf4j-api</artifactId>
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<version>1.7.25</version>
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</dependency>
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<dependency>
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<groupId>ch.qos.logback</groupId>
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<artifactId>logback-classic</artifactId>
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<version>1.2.3</version>
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</dependency>
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<dependency>
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<groupId>junit</groupId>
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<artifactId>junit</artifactId>
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<version>4.12</version>
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</dependency>
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</dependencies>
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</project>
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@ -0,0 +1,18 @@
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package com.baeldung;
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import java.text.MessageFormat;
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class CityAndDayLength {
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private final String city;
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private final double dayLengthInHours;
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public CityAndDayLength(String city, long dayLengthInSeconds) {
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this.city = city;
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this.dayLengthInHours = dayLengthInSeconds / (60.0 * 60.0);
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}
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@Override public String toString() {
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return MessageFormat.format("In {0} there are {1,number,#0.0} hours of light.", city, dayLengthInHours);
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}
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}
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@ -0,0 +1,45 @@
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package com.baeldung;
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import io.reactivex.Flowable;
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import io.vertx.core.http.RequestOptions;
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import io.vertx.reactivex.core.http.HttpClient;
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import io.vertx.reactivex.core.http.HttpClientRequest;
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import io.vertx.reactivex.core.http.HttpClientResponse;
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import static java.lang.String.format;
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public class MetaWeatherClient {
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private static RequestOptions metawether = new RequestOptions()
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.setHost("www.metaweather.com")
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.setPort(443)
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.setSsl(true);
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/**
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* @return A flowable backed by vertx that automatically sends an HTTP request at soon as the first subscription is received.
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*/
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private static Flowable<HttpClientResponse> autoPerformingReq(HttpClient httpClient, String uri) {
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HttpClientRequest req = httpClient.get(new RequestOptions(metawether).setURI(uri));
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return req.toFlowable()
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.doOnSubscribe(subscription -> req.end());
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}
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static Flowable<HttpClientResponse> searchByCityName(HttpClient httpClient, String cityName) {
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HttpClientRequest req = httpClient.get(
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new RequestOptions()
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.setHost("www.metaweather.com")
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.setPort(443)
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.setSsl(true)
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.setURI(format("/api/location/search/?query=%s", cityName)));
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return req
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.toFlowable()
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.doOnSubscribe(subscription -> req.end());
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}
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static Flowable<HttpClientResponse> getDataByPlaceId(HttpClient httpClient, long placeId) {
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return autoPerformingReq(
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httpClient,
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format("/api/location/%s/", placeId));
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}
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}
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@ -0,0 +1,94 @@
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package com.baeldung;
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import io.reactivex.Flowable;
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import io.vertx.reactivex.core.Vertx;
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import io.vertx.reactivex.core.buffer.Buffer;
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import io.vertx.reactivex.core.file.FileSystem;
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import io.vertx.reactivex.core.http.HttpClient;
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import org.junit.After;
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import org.junit.Before;
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import org.junit.Test;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import java.time.ZonedDateTime;
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import static com.baeldung.MetaWeatherClient.getDataByPlaceId;
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import static com.baeldung.MetaWeatherClient.searchByCityName;
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public class VertxWithRxJavaTest {
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private Vertx vertx;
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private HttpClient httpClient;
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private FileSystem fileSystem;
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static Logger log = LoggerFactory.getLogger(VertxWithRxJavaTest.class);
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@Before public void setUp() {
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vertx = io.vertx.reactivex.core.Vertx.vertx();
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httpClient = vertx.createHttpClient();
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fileSystem = vertx.fileSystem();
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}
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@After public void tearDown() {
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vertx.close();
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}
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@Test public void lightLengthTest() throws InterruptedException {
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// read the file that contains one city name per line
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fileSystem
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.rxReadFile("cities.txt").toFlowable()
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.doOnNext(buffer -> log.info("File buffer ---\n{}\n---", buffer))
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// split file content in lines to obtain one city per line
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.flatMap(buffer -> Flowable.fromArray(buffer.toString().split("\\r?\\n")))
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.doOnNext(city -> log.info("City from file: '{}'", city))
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// discard cities that are commented out with a leading '#'
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.filter(city -> !city.startsWith("#"))
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.doOnNext(city -> log.info("City that survived filtering: '{}'", city))
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// for each city sends a request to obtain its 'woeid'
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// and collect the buffer from the answer
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.flatMap(city -> searchByCityName(httpClient, city) )
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.flatMap(response -> response.toFlowable())
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.doOnNext(buffer -> log.info("JSON of city detail: '{}'", buffer))
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// get the woeid of each city
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.map(cityBuffer -> cityBuffer
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.toJsonArray()
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.getJsonObject(0)
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.getLong("woeid"))
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// use the id to ask for data
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.flatMap(cityId -> getDataByPlaceId(httpClient, cityId))
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.flatMap(response -> response
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.toObservable()
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.reduce(
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Buffer.buffer(),
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(total, newBuf) -> total.appendBuffer( newBuf )).toFlowable() )
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// get the JSON object out of the response
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.doOnNext(buffer -> log.info("JSON of place detail: '{}'", buffer))
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.map(buffer -> buffer.toJsonObject())
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// map the JSON in a POJO
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.map(json -> {
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ZonedDateTime sunRise = ZonedDateTime.parse(json.getString("sun_rise"));
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ZonedDateTime sunSet = ZonedDateTime.parse(json.getString("sun_set"));
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String cityName = json.getString("title");
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return new CityAndDayLength(
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cityName,sunSet.toEpochSecond() - sunRise.toEpochSecond());
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})
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// consume the events
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.subscribe(
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cityAndDayLength -> System.out.println(cityAndDayLength),
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ex -> ex.printStackTrace());
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// enough to give time to complete the execution
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Thread.sleep(20000);
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}
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}
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@ -0,0 +1,6 @@
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Milan
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Chicago
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Cairo
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Santiago
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Moscow
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Auckland
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@ -0,0 +1,12 @@
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<configuration>
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<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
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<encoder>
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<pattern>[%thread{32}] %-5level %msg - %logger%n</pattern>
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</encoder>
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</appender>
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<root level="warn">
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<appender-ref ref="STDOUT" />
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</root>
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</configuration>
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