added metric with tomcat version

changelog/unreleased/000003-tomcat-version.yml

@@ -0,0 +1,10 @@
+title: Added new metric `hofund_web_server_info` with information about type and version of web server.
+authors:
+  - name: Peter Zmilczak
+    nick: marwin1991
+    url: https://github.com/marwin1991
+type: added #[added/changed/deprecated/removed/fixed/security/other]
+issues:
+  - 26
+merge_requests:
+  - 27

hofund-core/src/main/java/dev/logchange/hofund/web/HofundWebServerInfo.java

@@ -0,0 +1,31 @@
+package dev.logchange.hofund.web;
+
+import lombok.AccessLevel;
+import lombok.Builder;
+import lombok.Getter;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+
+@Slf4j
+@Getter
+@Builder(access = AccessLevel.PRIVATE)
+@RequiredArgsConstructor(access = AccessLevel.PRIVATE)
+public class HofundWebServerInfo {
+
+    private final String name;
+
+    private final String version;
+
+    public static HofundWebServerInfo create(String name, String version) {
+        log.info("Server name: " + name + " version: " + version);
+
+        return HofundWebServerInfo.builder()
+                .name(name)
+                .version(version)
+                .build();
+    }
+
+
+
+}
+

hofund-core/src/main/java/dev/logchange/hofund/web/HofundWebServerInfoMeter.java

@@ -0,0 +1,42 @@
+package dev.logchange.hofund.web;
+
+import io.micrometer.core.instrument.Gauge;
+import io.micrometer.core.instrument.MeterRegistry;
+import io.micrometer.core.instrument.Tag;
+import io.micrometer.core.instrument.binder.MeterBinder;
+
+import java.util.LinkedList;
+import java.util.List;
+import java.util.concurrent.atomic.AtomicInteger;
+
+public class HofundWebServerInfoMeter implements MeterBinder {
+
+    private static final String NAME = "hofund_web_server_info";
+    private static final String DESCRIPTION = "Basic information about web server that is running this application";
+
+    private final HofundWebServerInfo info;
+    private final AtomicInteger atomicInteger;
+
+    public HofundWebServerInfoMeter(HofundWebServerInfoProvider provider) {
+        this.info = provider.get();
+        this.atomicInteger = new AtomicInteger(1);
+    }
+
+    @Override
+    public void bindTo(MeterRegistry meterRegistry) {
+        Gauge.builder(NAME, atomicInteger, AtomicInteger::doubleValue)
+                .description(DESCRIPTION)
+                .tags(tags())
+                .register(meterRegistry);
+    }
+
+    private List<Tag> tags() {
+        List<Tag> tags = new LinkedList<>();
+
+        tags.add(Tag.of("name", info.getName()));
+        tags.add(Tag.of("version", info.getVersion()));
+
+        return tags;
+    }
+
+}

hofund-core/src/main/java/dev/logchange/hofund/web/HofundWebServerInfoProvider.java

@@ -0,0 +1,8 @@
+package dev.logchange.hofund.web;
+
+public interface HofundWebServerInfoProvider {
+
+    HofundWebServerInfo get();
+
+}
+

hofund-spring-boot-autoconfigure/pom.xml

@@ -23,6 +23,22 @@
             <scope>provided</scope>
         </dependency>
 
+        <dependency>
+            <groupId>dev.logchange.hofund</groupId>
+            <artifactId>hofund-spring</artifactId>
+            <version>${project.version}</version>
+            <optional>true</optional> <!-- Optional, because it's defined in -starter module -->
+        </dependency>
+
+        <!-- https://www.baeldung.com/maven-optional-dependency#what-is-ltoptionalgt -->
+
+        <dependency>
+            <groupId>org.apache.tomcat.embed</groupId>
+            <artifactId>tomcat-embed-core</artifactId>
+            <version>${tomcat-embed-core.version}</version>
+            <optional>true</optional>
+        </dependency>
+
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-configuration-processor</artifactId>
@@ -37,12 +53,6 @@
             <optional>true</optional>
         </dependency>
 
-        <dependency>
-            <groupId>dev.logchange.hofund</groupId>
-            <artifactId>hofund-spring</artifactId>
-            <version>${project.version}</version>
-            <optional>true</optional>
-        </dependency>
     </dependencies>
 
 </project>

hofund-spring-boot-autoconfigure/src/main/java/dev/logchange/hofund/web/springboot/autoconfigure/HofundWebServerInfoAutoConfiguration.java

@@ -0,0 +1,34 @@
+package dev.logchange.hofund.web.springboot.autoconfigure;
+
+import dev.logchange.hofund.web.HofundWebServerInfo;
+import dev.logchange.hofund.web.HofundWebServerInfoMeter;
+import dev.logchange.hofund.web.HofundWebServerInfoProvider;
+import io.micrometer.prometheus.PrometheusMeterRegistry;
+import lombok.RequiredArgsConstructor;
+import org.apache.catalina.util.ServerInfo;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+@RequiredArgsConstructor
+@Configuration(proxyBeanMethods = false)
+//available since spring boot 2.4.0
+//@ConditionalOnEnabledMetricsExport(value="prometheus")
+@ConditionalOnClass(PrometheusMeterRegistry.class)
+public class HofundWebServerInfoAutoConfiguration {
+
+    @Bean
+    @ConditionalOnMissingBean
+    public HofundWebServerInfoMeter hofundWebServerInfoMeter(HofundWebServerInfoProvider provider) {
+        return new HofundWebServerInfoMeter(provider);
+    }
+
+
+    @Bean
+    @ConditionalOnClass(ServerInfo.class)
+    public HofundWebServerInfoProvider tomcatHofundWebServerInfoProvider(){
+        return () -> HofundWebServerInfo.create("Apache Tomcat", ServerInfo.getServerNumber());
+    }
+
+}

hofund-spring-boot-autoconfigure/src/main/resources/META-INF/spring.factories

@@ -2,4 +2,7 @@ org.springframework.boot.autoconfigure.EnableAutoConfiguration=\
 dev.logchange.hofund.info.springboot.autoconfigure.HofundInfoAutoConfiguration,\
 dev.logchange.hofund.git.springboot.autoconfigure.HofundGitInfoAutoConfiguration,\
 dev.logchange.hofund.connection.springboot.autoconfigure.HofundConnectionAutoConfiguration,\
-dev.logchange.hofund.graph.springboot.autoconfigure.HofundGraphAutoConfiguration
+dev.logchange.hofund.graph.springboot.autoconfigure.HofundGraphAutoConfiguration,\
+dev.logchange.hofund.java.springboot.autoconfigure.HofundJavaInfoAutoConfiguration,\
+dev.logchange.hofund.os.springboot.autoconfigure.HofundOsInfoAutoConfiguration,\
+dev.logchange.hofund.web.springboot.autoconfigure.HofundWebServerInfoAutoConfiguration

hofund-spring-boot-autoconfigure/src/main/resources/META-INF/spring/org.springframework.boot.autoconfigure.AutoConfiguration.imports

@@ -1,4 +1,7 @@
 dev.logchange.hofund.info.springboot.autoconfigure.HofundInfoAutoConfiguration
 dev.logchange.hofund.git.springboot.autoconfigure.HofundGitInfoAutoConfiguration
 dev.logchange.hofund.connection.springboot.autoconfigure.HofundConnectionAutoConfiguration
-dev.logchange.hofund.graph.springboot.autoconfigure.HofundGraphAutoConfiguration
+dev.logchange.hofund.graph.springboot.autoconfigure.HofundGraphAutoConfiguration
+dev.logchange.hofund.java.springboot.autoconfigure.HofundJavaInfoAutoConfiguration
+dev.logchange.hofund.os.springboot.autoconfigure.HofundOsInfoAutoConfiguration
+dev.logchange.hofund.web.springboot.autoconfigure.HofundWebServerInfoAutoConfiguration

hofund-spring-boot-e2e/src/test/java/dev/logchange/hofund/java/HofundJavaInfoE2ETest.java

@@ -53,7 +53,7 @@ void shouldContainsHofundJavaInfo() {
         String response = template.getForObject(path, String.class);
 
         //then:
-        log.info("Expecting: \n{}", expected);
+        log.info("Expecting: \n{}\nResponse: \n{}", expected, response);
         Assertions.assertTrue(response.contains(expected));
     }
 }

hofund-spring-boot-e2e/src/test/java/dev/logchange/hofund/os/HofundOsInfoE2ETest.java

@@ -40,7 +40,7 @@ void shouldContainsHofundOsInfo() {
         String response = template.getForObject(path, String.class);
 
         //then:
-        log.info("Expecting: \n{}", expected);
+        log.info("Expecting: \n{}\nResponse: \n{}", expected, response);
         Assertions.assertTrue(response.contains(expected));
     }
 }

hofund-spring-boot-e2e/src/test/java/dev/logchange/hofund/web/HofundWebServerInfoE2ETest.java

@@ -0,0 +1,43 @@
+package dev.logchange.hofund.web;
+
+
+import lombok.extern.slf4j.Slf4j;
+import org.apache.catalina.util.ServerInfo;
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+import org.springframework.boot.test.autoconfigure.actuate.observability.AutoConfigureObservability;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.boot.test.web.client.TestRestTemplate;
+import org.springframework.boot.test.web.server.LocalServerPort;
+
+@Slf4j
+@AutoConfigureObservability
+@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
+public class HofundWebServerInfoE2ETest {
+
+    private final TestRestTemplate template = new TestRestTemplate();
+
+    @LocalServerPort
+    private int port;
+
+    @Test
+    void shouldContainsHofundOsInfo() {
+        //given:
+        String path = "http://localhost:" + port + "/actuator/prometheus";
+
+        String version = ServerInfo.getServerNumber();
+
+        String expected =
+                "# HELP hofund_web_server_info Basic information about web server that is running this application\n" +
+                "# TYPE hofund_web_server_info gauge\n" +
+                "hofund_web_server_info{name=\"Apache Tomcat\",version=\"{version}\",} 1.0"
+                .replace("{version}", version);
+
+        //when:
+        String response = template.getForObject(path, String.class);
+
+        //then:
+        log.info("Expecting: \n{}\nResponse: \n{}", expected, response);
+        Assertions.assertTrue(response.contains(expected));
+    }
+}

pom.xml

@@ -64,9 +64,11 @@
         <lombok.version>1.18.30</lombok.version>
 
         <!-- Provided, project with spring has to have spring, so we should not create jar hell with other spring version -->
+        <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot/2.2.0.RELEASE -->
+        <spring-boot.version>[2.2.0.RELEASE,)</spring-boot.version>
         <micrometer-io.version>[1.3.0,)</micrometer-io.version>
-        <spring-framework.version>[5.2.12.RELEASE,6.0.0)</spring-framework.version>
-        <spring-boot.version>[2.2.0.RELEASE,3.0.0)</spring-boot.version>
+        <spring-framework.version>[5.2.12.RELEASE,)</spring-framework.version>
+        <tomcat-embed-core.version>[9.0.27,)</tomcat-embed-core.version>
         <micrometer-registry-prometheus.version>[1.3.16,)</micrometer-registry-prometheus.version>
         <slf4j.version>[1.7.28,)</slf4j.version>