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JAVA-29231 Move modules inside existing container modules (#15492)

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anuragkumawat
2024-01-01 11:27:05 -08:00
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parent 76bde3ff46
commit 2096eac575
209 changed files with 472 additions and 222 deletions
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core-java-modules/java-spi/README.md
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## Java SPI
This module contains articles about the Service Provider Interface (SPI) in Java.
### Relevant Articles:
- [Java Service Provider Interface](https://www.baeldung.com/java-spi)
core-java-modules/java-spi/exchange-rate-api/pom.xml
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<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<artifactId>exchange-rate-api</artifactId>
<name>exchange-rate-api</name>
<packaging>jar</packaging>
<parent>
<groupId>com.baeldung</groupId>
<artifactId>java-spi</artifactId>
<version>1.0.0-SNAPSHOT</version>
</parent>
</project>
core-java-modules/java-spi/exchange-rate-api/src/main/java/com/baeldung/rate/ExchangeRate.java
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package com.baeldung.rate;
import com.baeldung.rate.exception.ProviderNotFoundException;
import com.baeldung.rate.spi.ExchangeRateProvider;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.ServiceLoader;
public final class ExchangeRate {
private static final String DEFAULT_PROVIDER = "com.baeldung.rate.spi.YahooFinanceExchangeRateProvider";
//All providers
public static List<ExchangeRateProvider> providers() {
List<ExchangeRateProvider> services = new ArrayList<>();
ServiceLoader<ExchangeRateProvider> loader = ServiceLoader.load(ExchangeRateProvider.class);
loader.forEach(services::add);
return services;
}
//Default provider
public static ExchangeRateProvider provider() {
return provider(DEFAULT_PROVIDER);
}
//provider by name
public static ExchangeRateProvider provider(String providerName) {
ServiceLoader<ExchangeRateProvider> loader = ServiceLoader.load(ExchangeRateProvider.class);
Iterator<ExchangeRateProvider> it = loader.iterator();
while (it.hasNext()) {
ExchangeRateProvider provider = it.next();
if (providerName.equals(provider.getClass().getName())) {
return provider;
}
}
throw new ProviderNotFoundException("Exchange Rate provider " + providerName + " not found");
}
}
core-java-modules/java-spi/exchange-rate-api/src/main/java/com/baeldung/rate/api/Quote.java
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package com.baeldung.rate.api;
import java.math.BigDecimal;
import java.time.LocalDate;
public class Quote {
private String currency;
private BigDecimal ask;
private BigDecimal bid;
private LocalDate date;
public Quote(String currency, BigDecimal ask, BigDecimal bid) {
this.currency = currency;
this.ask = ask;
this.bid = bid;
}
public String getCurrency() {
return currency;
}
public void setCurrency(String currency) {
this.currency = currency;
}
public BigDecimal getAsk() {
return ask;
}
public void setAsk(BigDecimal ask) {
this.ask = ask;
}
public BigDecimal getBid() {
return bid;
}
public void setBid(BigDecimal bid) {
this.bid = bid;
}
public LocalDate getDate() {
return date;
}
public void setDate(LocalDate date) {
this.date = date;
}
}
core-java-modules/java-spi/exchange-rate-api/src/main/java/com/baeldung/rate/api/QuoteManager.java
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package com.baeldung.rate.api;
import java.time.LocalDate;
import java.util.List;
public interface QuoteManager {
List<Quote> getQuotes(String baseCurrency, LocalDate date);
}
core-java-modules/java-spi/exchange-rate-api/src/main/java/com/baeldung/rate/exception/ProviderNotFoundException.java
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package com.baeldung.rate.exception;
public class ProviderNotFoundException extends RuntimeException {
public ProviderNotFoundException() {
super();
}
public ProviderNotFoundException(String message) {
super(message);
}
}
core-java-modules/java-spi/exchange-rate-api/src/main/java/com/baeldung/rate/spi/ExchangeRateProvider.java
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package com.baeldung.rate.spi;
import com.baeldung.rate.api.QuoteManager;
public interface ExchangeRateProvider {
QuoteManager create();
}
core-java-modules/java-spi/exchange-rate-api/src/main/resources/logback.xml
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<?xml version="1.0" encoding="UTF-8"?>
<configuration>
<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
<encoder>
<pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n
</pattern>
</encoder>
</appender>
<root level="INFO">
<appender-ref ref="STDOUT" />
</root>
</configuration>
core-java-modules/java-spi/exchange-rate-app/pom.xml
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<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<artifactId>exchange-rate-app</artifactId>
<name>exchange-rate-app</name>
<packaging>jar</packaging>
<parent>
<groupId>com.baeldung</groupId>
<artifactId>java-spi</artifactId>
<version>1.0.0-SNAPSHOT</version>
</parent>
<dependencies>
<dependency>
<groupId>com.baeldung</groupId>
<artifactId>exchange-rate-api</artifactId>
<version>${exchange-rate-api.version}</version>
</dependency>
</dependencies>
<properties>
<exchange-rate-api.version>1.0.0-SNAPSHOT</exchange-rate-api.version>
</properties>
</project>
core-java-modules/java-spi/exchange-rate-app/src/main/java/com/baeldung/rate/app/MainApp.java
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package com.baeldung.rate.app;
import com.baeldung.rate.ExchangeRate;
import com.baeldung.rate.api.Quote;
import java.time.LocalDate;
import java.util.List;
public class MainApp {
public static void main(String... args) {
ExchangeRate.providers().forEach(provider -> {
System.out.println("Retreiving USD quotes from provider :" + provider);
List<Quote> quotes = provider.create().getQuotes("USD", LocalDate.now());
System.out.println(String.format("%14s%12s|%12s", "","Ask", "Bid"));
System.out.println("----------------------------------------");
quotes.forEach(quote -> {
System.out.println("USD --> " + quote.getCurrency() + " : " + String.format("%12f|%12f", quote.getAsk(), quote.getBid()));
});
});
}
}
core-java-modules/java-spi/exchange-rate-app/src/main/resources/logback.xml
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<?xml version="1.0" encoding="UTF-8"?>
<configuration>
<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
<encoder>
<pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n
</pattern>
</encoder>
</appender>
<root level="INFO">
<appender-ref ref="STDOUT" />
</root>
</configuration>
core-java-modules/java-spi/exchange-rate-impl/pom.xml
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<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<artifactId>exchange-rate-impl</artifactId>
<name>exchange-rate-impl</name>
<packaging>jar</packaging>
<parent>
<groupId>com.baeldung</groupId>
<artifactId>java-spi</artifactId>
<version>1.0.0-SNAPSHOT</version>
</parent>
<dependencies>
<dependency>
<groupId>com.baeldung</groupId>
<artifactId>exchange-rate-api</artifactId>
<version>${exchange-rate-api.version}</version>
</dependency>
<dependency>
<groupId>com.squareup.okhttp3</groupId>
<artifactId>okhttp</artifactId>
<version>${okhttp.version}</version>
</dependency>
<dependency>
<groupId>javax.json.bind</groupId>
<artifactId>javax.json.bind-api</artifactId>
<version>${javax.json.bind-api.version}</version>
</dependency>
<dependency>
<groupId>org.eclipse</groupId>
<artifactId>yasson</artifactId>
<version>${yasson.version}</version>
</dependency>
<dependency>
<groupId>org.glassfish</groupId>
<artifactId>javax.json</artifactId>
<version>${javax.json.version}</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-dependency-plugin</artifactId>
<version>${maven-dependency-plugin.version}</version>
<executions>
<execution>
<id>copy-dependencies</id>
<phase>package</phase>
<goals>
<goal>copy-dependencies</goal>
</goals>
<configuration>
<outputDirectory>${project.build.directory}/depends</outputDirectory>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
<properties>
<exchange-rate-api.version>1.0.0-SNAPSHOT</exchange-rate-api.version>
<okhttp.version>4.12.0</okhttp.version>
<javax.json.bind-api.version>1.0</javax.json.bind-api.version>
<yasson.version>1.0.1</yasson.version>
<javax.json.version>1.1.2</javax.json.version>
<maven-dependency-plugin.version>3.1.0</maven-dependency-plugin.version>
</properties>
</project>
core-java-modules/java-spi/exchange-rate-impl/src/main/java/com/baeldung/rate/impl/YahooFinanceExchangeRateProvider.java
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package com.baeldung.rate.impl;
import com.baeldung.rate.api.QuoteManager;
import com.baeldung.rate.spi.ExchangeRateProvider;
public class YahooFinanceExchangeRateProvider implements ExchangeRateProvider {
@Override
public QuoteManager create() {
return new YahooQuoteManagerImpl();
}
}
core-java-modules/java-spi/exchange-rate-impl/src/main/java/com/baeldung/rate/impl/YahooQuoteManagerImpl.java
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package com.baeldung.rate.impl;
import com.baeldung.rate.api.Quote;
import com.baeldung.rate.api.QuoteManager;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.Response;
import javax.json.bind.Jsonb;
import javax.json.bind.JsonbBuilder;
import java.io.IOException;
import java.math.BigDecimal;
import java.time.LocalDate;
import java.util.ArrayList;
import java.util.Currency;
import java.util.List;
import java.util.Map;
public class YahooQuoteManagerImpl implements QuoteManager {
static final String URL_PROVIDER = "https://query2.finance.yahoo.com/v6/finance/quoteSummary/%s=X?modules=summaryDetail";
OkHttpClient client = new OkHttpClient();
@Override
public List<Quote> getQuotes(String baseCurrency, LocalDate date) {
List<String> currencyQuery = new ArrayList<>();
Currency.getAvailableCurrencies().forEach(currency -> {
if (!baseCurrency.equals(currency.getCurrencyCode())) {
currencyQuery.add(String.format(URL_PROVIDER, baseCurrency + currency.getCurrencyCode()));
}
});
final List<Quote> quotes = new ArrayList<>();
for (String url: currencyQuery) {
String response = doGetRequest(url);
if (response != null) {
final Quote map = map(response);
if (map != null) {
quotes.add(map);
}
}
}
return quotes;
}
private Quote map(String response) {
try (final Jsonb jsonb = JsonbBuilder.create()) {
final Map qrw = jsonb.fromJson(response, Map.class);
return parseResult(qrw);
} catch (Exception e) {
System.out.println("Error while trying to read response");
return null;
}
}
private static Quote parseResult(Map qrw) {
Quote quote = null;
if (qrw != null) {
final Map quoteSummary = (Map) qrw.get("quoteSummary");
if (quoteSummary != null) {
final List<Map> result = (List<Map>) quoteSummary.get("result");
if (result != null) {
final Map resultArray = result.get(0);
if (resultArray != null) {
final Map summaryDetail = (Map) resultArray.get("summaryDetail");
if (summaryDetail != null) {
quote = constructQuote(summaryDetail);
}
}
}
}
}
return quote;
}
private static Quote constructQuote(Map summaryDetail) {
final String currency = (String) summaryDetail.get("currency");
final Map ask = (Map) summaryDetail.get("ask");
final Map bid = (Map) summaryDetail.get("bid");
final BigDecimal askPrice = (BigDecimal) ask.get("raw");
final BigDecimal bidPrice = (BigDecimal) bid.get("raw");
if (askPrice != null && bidPrice != null) {
return new Quote(currency, askPrice, bidPrice);
}
return null;
}
String doGetRequest(String url) {
System.out.println(url);
Request request = new Request.Builder()
.url(url)
.build();
Response response;
try {
response = client.newCall(request).execute();
return response.body().string();
} catch (IOException e) {
return null;
}
}
}
core-java-modules/java-spi/exchange-rate-impl/src/main/resources/META-INF/services/com.baeldung.rate.spi.ExchangeRateProvider
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com.baeldung.rate.impl.YahooFinanceExchangeRateProvider
core-java-modules/java-spi/exchange-rate-impl/src/main/resources/logback.xml
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<?xml version="1.0" encoding="UTF-8"?>
<configuration>
<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
<encoder>
<pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n
</pattern>
</encoder>
</appender>
<root level="INFO">
<appender-ref ref="STDOUT" />
</root>
</configuration>
core-java-modules/java-spi/pom.xml
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<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<artifactId>java-spi</artifactId>
<name>java-spi</name>
<packaging>pom</packaging>
<parent>
<groupId>com.baeldung.core-java-modules</groupId>
<artifactId>core-java-modules</artifactId>
<version>0.0.1-SNAPSHOT</version>
</parent>
<modules>
<module>exchange-rate-api</module>
<module>exchange-rate-impl</module>
<module>exchange-rate-app</module>
</modules>
</project>