Work on avoiding lingering sessions on the HMC.

build.gradle

@@ -17,15 +17,15 @@ group = projectGroup
 version = projectVersion
 
 dependencies {
-    annotationProcessor 'info.picocli:picocli-codegen:4.7.3'
-    implementation 'info.picocli:picocli:4.7.3'
+    annotationProcessor 'info.picocli:picocli-codegen:4.7.4'
+    implementation 'info.picocli:picocli:4.7.4'
     implementation 'org.slf4j:slf4j-api:2.0.7'
     implementation 'org.slf4j:slf4j-simple:2.0.7'
-    implementation 'com.squareup.okhttp3:okhttp:4.10.0' // Also used by InfluxDB Client
-    implementation 'com.influxdb:influxdb-client-java:6.8.0'
-    implementation 'com.fasterxml.jackson.core:jackson-databind:2.14.3'
-    implementation 'com.fasterxml.jackson.dataformat:jackson-dataformat-xml:2.14.3'
-    implementation 'com.fasterxml.jackson.dataformat:jackson-dataformat-toml:2.14.3'
+    implementation 'com.squareup.okhttp3:okhttp:4.11.0' // Also used by InfluxDB Client
+    implementation 'com.influxdb:influxdb-client-java:6.10.0'
+    implementation 'com.fasterxml.jackson.core:jackson-databind:2.15.2'
+    implementation 'com.fasterxml.jackson.dataformat:jackson-dataformat-xml:2.15.2'
+    implementation 'com.fasterxml.jackson.dataformat:jackson-dataformat-toml:2.15.2'
 
     testImplementation 'junit:junit:4.13.2'
     testImplementation 'org.spockframework:spock-core:2.3-groovy-4.0'

doc/readme-hmc.md

@@ -11,9 +11,9 @@ Ensure you have **correct date/time** and NTPd running to keep it accurate!
 - Navigate to *Users and Security*
     - Create a new read-only/viewer **hmci** user, which will be used to connect to the HMC.
     - Click *Manage User Profiles and Access*, edit the newly created *hmci* user and click *User Properties*:
-        - Set *Session timeout minutes* to **60**
+        - Set *Session timeout minutes* to **120** (or at least 61 minutes)
         - Set *Verify timeout minutes* to **15**
-        - Set *Idle timeout minutes* to **90**
+        - Set *Idle timeout minutes* to **15**
         - Set *Minimum time in days between password changes* to **0**
         - **Enable** *Allow remote access via the web*
 - Navigate to *HMC Management* and *Console Settings*

gradle.properties

@@ -1,3 +1,3 @@
 projectId               = hmci
 projectGroup            = biz.nellemann.hmci
-projectVersion          = 1.4.4
+projectVersion          = 1.4.5

src/main/java/biz/nellemann/hmci/InfluxClient.java

@@ -83,10 +83,10 @@ public final class InfluxClient {
                 Runtime.getRuntime().addShutdownHook(new Thread(influxDBClient::close));
 
                 // Todo: Handle events - https://github.com/influxdata/influxdb-client-java/tree/master/client#handle-the-events
-                //writeApi = influxDBClient.makeWriteApi();
                 writeApi = influxDBClient.makeWriteApi(
                     WriteOptions.builder()
-                        .bufferLimit(20_000)
+                        .batchSize(15_000)
+                        .bufferLimit(500_000)
                         .flushInterval(5_000)
                         .build());
 

src/main/java/biz/nellemann/hmci/RestClient.java

@@ -16,6 +16,8 @@ import java.security.KeyManagementException;
 import java.security.NoSuchAlgorithmException;
 import java.security.SecureRandom;
 import java.security.cert.X509Certificate;
+import java.time.Instant;
+import java.time.temporal.ChronoUnit;
 import java.util.Objects;
 import java.util.concurrent.TimeUnit;
 
@@ -38,6 +40,9 @@ public class RestClient {
     protected final String username;
     protected final String password;
 
+    private final static int MAX_MINUTES_BETWEEN_AUTHENTICATION = 60; // TODO: Make configurable and match HMC timeout settings
+    private Instant lastAuthenticationTimestamp;
+
 
     public RestClient(String baseUrl, String username, String password, Boolean trustAll) {
         this.baseUrl = baseUrl;
@@ -63,6 +68,8 @@ public class RestClient {
                 log.error("ManagementConsole() - trace error: " + e.getMessage());
             }
         }*/
+        Thread shutdownHook = new Thread(this::logoff);
+        Runtime.getRuntime().addShutdownHook(shutdownHook);
     }
 
 
@@ -70,6 +77,9 @@ public class RestClient {
      * Logon to the HMC and get an authentication token for further requests.
      */
     public synchronized void login() {
+        if(authToken != null) {
+            logoff();
+        }
 
         log.info("Connecting to HMC - {} @ {}", username, baseUrl);
         StringBuilder payload = new StringBuilder();
@@ -102,10 +112,12 @@ public class RestClient {
             LogonResponse logonResponse = xmlMapper.readValue(responseBody, LogonResponse.class);
 
             authToken = logonResponse.getToken();
+            lastAuthenticationTimestamp = Instant.now();
             log.debug("logon() - auth token: {}", authToken);
 
         } catch (Exception e) {
             log.warn("logon() - error: {}", e.getMessage());
+            lastAuthenticationTimestamp = null;
         }
 
     }
@@ -136,6 +148,7 @@ public class RestClient {
                 log.warn("logoff() error: {}", e.getMessage());
             } finally {
                 authToken = null;
+                lastAuthenticationTimestamp = null;
             }
 
         } catch (MalformedURLException e) {
@@ -164,6 +177,9 @@ public class RestClient {
     public synchronized String getRequest(URL url) throws IOException {
 
         log.debug("getRequest() - URL: {}", url.toString());
+        if (lastAuthenticationTimestamp == null || lastAuthenticationTimestamp.plus(MAX_MINUTES_BETWEEN_AUTHENTICATION, ChronoUnit.MINUTES).isBefore(Instant.now())) {
+            login();
+        }
 
         Request request = new Request.Builder()
             .url(url)
@@ -222,6 +238,10 @@ public class RestClient {
     public synchronized String postRequest(URL url, String payload) throws IOException {
 
         log.debug("sendPostRequest() - URL: {}", url.toString());
+        if (lastAuthenticationTimestamp == null || lastAuthenticationTimestamp.plus(MAX_MINUTES_BETWEEN_AUTHENTICATION, ChronoUnit.MINUTES).isBefore(Instant.now())) {
+            login();
+        }
+
         RequestBody requestBody;
         if(payload != null) {
             requestBody = RequestBody.create(payload, MEDIA_TYPE_IBM_XML_POST);

src/main/java/biz/nellemann/hmci/dto/json/PowerUtil.java

@@ -5,6 +5,6 @@ import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
 @JsonIgnoreProperties(ignoreUnknown = true)
 public final class PowerUtil {
 
-    public Number powerReading = 0.0;
+    public float powerReading = 0.0F;
 
 }

src/test/groovy/biz/nellemann/hmci/LogicalPartitionTest.groovy

@@ -52,6 +52,7 @@ class LogicalPartitionTest extends Specification {
     }
 
     def cleanupSpec() {
+        serviceClient.logoff()
         mockServer.stop()
     }
 

src/test/groovy/biz/nellemann/hmci/ManagedSystemTest.groovy

@@ -42,6 +42,7 @@ class ManagedSystemTest extends Specification {
     }
 
     def cleanupSpec() {
+        serviceClient.logoff()
         mockServer.stop()
     }