Merge remote-tracking branch 'origin/main'

Author: Eom-Ti

build.gradle.kts

@@ -19,6 +19,12 @@ repositories {
 
 dependencies {
     implementation("org.springframework.boot:spring-boot-starter")
+    implementation("org.springframework.boot:spring-boot-starter-web")
+    implementation("org.springframework.boot:spring-boot-starter-data-jpa")
+    runtimeOnly("com.h2database:h2:2.2.224")
+
+    implementation("org.springframework.boot:spring-boot-starter-actuator")
+
     testImplementation("org.springframework.boot:spring-boot-starter-test")
     testRuntimeOnly("org.junit.platform:junit-platform-launcher")
 }

img/amdahls_law.png

@@ -0,0 +1,12 @@
+package example.concurrency;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class Application {
+
+  public static void main(String[] args) {
+    SpringApplication.run(Application.class, args);
+  }
+}

img/ch10_connection_pool_deadlock.svg

@@ -0,0 +1,14 @@
+package example.concurrency.ch10;
+
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Propagation;
+import org.springframework.transaction.annotation.Transactional;
+
+@Service
+public class InnerService {
+
+  @Transactional(propagation = Propagation.REQUIRES_NEW)
+  public void innerMethod() {
+    System.out.printf("InnerService.innerMethod is called by %s%n", Thread.currentThread().getName());
+  }
+}

img/ch10_process_resource_diagram.svg

@@ -0,0 +1,28 @@
+package example.concurrency.ch10;
+
+import java.sql.Connection;
+import javax.sql.DataSource;
+import org.springframework.jdbc.datasource.DataSourceUtils;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+@Service
+public class OuterService {
+
+  private final InnerService innerService;
+
+  public OuterService(InnerService innerService) {
+    this.innerService = innerService;
+  }
+
+  @Transactional
+  public void outerMethod() {
+    System.out.printf("OuterService.outerMethod is called by %s%n", Thread.currentThread().getName());
+    try {
+      Thread.sleep(1000);
+      innerService.innerMethod();
+    } catch (Exception e) {
+      throw new RuntimeException(e.getMessage());
+    }
+  }
+}