Merge pull request #8125 from eugenp/revert-8119-BAEL-3275-2

Revert "BAEL-3275: Using blocking queue for pub-sub"

java-spi/exchange-rate-app/src/main/java/com/baeldung/rate/app/MainApp.java

@@ -0,0 +1,21 @@
+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()));
+            });
+        });
+    }
+}

java-spi/exchange-rate-app/src/main/resources/logback.xml

@@ -0,0 +1,13 @@
+<?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>