Fixes #12

Reintroduces checks to ensure that the native library is not loaded unless we are running under Linux with a notify socket available.

jsystemd-core/src/main/java/com/github/jpmsilva/jsystemd/SystemdNotify.java

@@ -16,6 +16,8 @@
 
 package com.github.jpmsilva.jsystemd;
 
+import static com.github.jpmsilva.jsystemd.SystemdUtilities.hasNotifySocket;
+import static com.github.jpmsilva.jsystemd.SystemdUtilities.isLinux;
 import static java.lang.invoke.MethodHandles.lookup;
 import static java.util.Objects.requireNonNull;
 import static org.slf4j.LoggerFactory.getLogger;
@@ -133,7 +135,7 @@ public static void registerShutdownHook() {
    * However, you may wish of explicitly close the integration channel, to ensure that all closeable resources are effectively closed.<br> As such, this method
    * should only be called at most once during the lifecycle of the JVM.
    *
-   * <p>Currenty this does nothing, as currently the only supported integration channel is the native libsystemd library, which does not need any cleanup.
+   * <p>Currently this does nothing, as currently the only supported integration channel is the native libsystemd library, which does not need any cleanup.
    */
   public static void close() {
   }
@@ -143,10 +145,12 @@ private static class Library {
     private static boolean initialized = false;
 
     static {
-      try {
-        Native.register("systemd");
-        initialized = true;
-      } catch (UnsatisfiedLinkError ignored) {
+      if (isLinux() && hasNotifySocket()) {
+        try {
+          Native.register("systemd");
+          initialized = true;
+        } catch (UnsatisfiedLinkError ignored) {
+        }
       }
     }
 

jsystemd-core/src/main/java/com/github/jpmsilva/jsystemd/SystemdUtilities.java

@@ -108,7 +108,7 @@ static boolean isLinux() {
   }
 
   static boolean hasNotifySocket() {
-    return notifySocketPath != null;
+    return notifySocketPath != null && notifySocketPath.toFile().exists();
   }
 
   private static final String[] unitPrefixes = new String[]{"", "Ki", "Mi", "Gi", "Ti", "Pi", "Ei"};

jsystemd-spring-boot-sample/pom.xml

@@ -24,7 +24,7 @@ limitations under the License.
   <parent>
     <groupId>com.github.jpmsilva.jsystemd</groupId>
     <artifactId>jsystemd</artifactId>
-    <version>3.0.1-SNAPSHOT</version>
+    <version>3.1.1-SNAPSHOT</version>
   </parent>
 
   <name>jsystemd sample Spring Boot application</name>
@@ -69,6 +69,17 @@ limitations under the License.
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-maven-plugin</artifactId>
         <version>${org.springframework.boot.version}</version>
+        <executions>
+          <execution>
+            <id>repackage</id>
+            <goals>
+              <goal>repackage</goal>
+            </goals>
+          </execution>
+        </executions>
+        <configuration>
+          <mainClass>com.github.jpmsilva.jsystemd.SampleApplication</mainClass>
+        </configuration>
       </plugin>
     </plugins>
   </build>

jsystemd-spring-boot-starter/src/main/java/com/github/jpmsilva/jsystemd/SystemdAutoConfiguration.java

@@ -73,7 +73,7 @@ public class SystemdAutoConfiguration {
    */
   @EventListener
   public void started(@SuppressWarnings("unused") AvailabilityChangeEvent<ReadinessState> event) {
-    if(event.getState() == ReadinessState.ACCEPTING_TRAFFIC) {
+    if (event.getState() == ReadinessState.ACCEPTING_TRAFFIC) {
       systemd.ready();
     }
   }
@@ -84,12 +84,6 @@ SystemdLifecycle systemdLifecycle() {
     return new SystemdLifecycle(systemd);
   }
 
-  @Bean
-  @NotNull
-  SystemdServletContextListener systemdServletContextListener() {
-    return new SystemdServletContextListener();
-  }
-
   @Bean
   @NotNull
   SystemdStatusProvider systemdNotifyHeapStatus() {

pom.xml

@@ -411,7 +411,9 @@ limitations under the License.
     <profile>
       <id>sample</id>
       <activation>
-        <activeByDefault>true</activeByDefault>
+        <property>
+          <name>!performRelease</name>
+        </property>
       </activation>
       <modules>
         <module>jsystemd-spring-boot-sample</module>