[Feature] Set Executor Instances limits dynamically from properties (#2193)

* Update 'ProcessExecutor.java' to use dynamic process limits from properties

* Move limits location out of 'application.properties'

* Rename 'SemaphoreLimit' to 'SessionLimit' and bundle with 'Timeout...' into one parent class

src/main/java/stirling/software/SPDF/model/ApplicationProperties.java

@@ -47,6 +47,7 @@ public class ApplicationProperties {
     private AutomaticallyGenerated automaticallyGenerated = new AutomaticallyGenerated();
     private EnterpriseEdition enterpriseEdition = new EnterpriseEdition();
     private AutoPipeline autoPipeline = new AutoPipeline();
+    private ProcessExecutor processExecutor = new ProcessExecutor();
 
     @Data
     public static class AutoPipeline {
@@ -309,4 +310,98 @@ public class ApplicationProperties {
             }
         }
     }
+
+    @Data
+    public static class ProcessExecutor {
+        private SessionLimit sessionLimit = new SessionLimit();
+        private TimeoutMinutes timeoutMinutes = new TimeoutMinutes();
+
+        @Data
+        public static class SessionLimit {
+            private int libreOfficeSessionLimit;
+            private int pdfToHtmlSessionLimit;
+            private int ocrMyPdfSessionLimit;
+            private int pythonOpenCvSessionLimit;
+            private int ghostScriptSessionLimit;
+            private int weasyPrintSessionLimit;
+            private int installAppSessionLimit;
+            private int calibreSessionLimit;
+
+            public int getLibreOfficeSessionLimit() {
+                return libreOfficeSessionLimit > 0 ? libreOfficeSessionLimit : 1;
+            }
+
+            public int getPdfToHtmlSessionLimit() {
+                return pdfToHtmlSessionLimit > 0 ? pdfToHtmlSessionLimit : 1;
+            }
+
+            public int getOcrMyPdfSessionLimit() {
+                return ocrMyPdfSessionLimit > 0 ? ocrMyPdfSessionLimit : 2;
+            }
+
+            public int getPythonOpenCvSessionLimit() {
+                return pythonOpenCvSessionLimit > 0 ? pythonOpenCvSessionLimit : 8;
+            }
+
+            public int getGhostScriptSessionLimit() {
+                return ghostScriptSessionLimit > 0 ? ghostScriptSessionLimit : 16;
+            }
+
+            public int getWeasyPrintSessionLimit() {
+                return weasyPrintSessionLimit > 0 ? weasyPrintSessionLimit : 16;
+            }
+
+            public int getInstallAppSessionLimit() {
+                return installAppSessionLimit > 0 ? installAppSessionLimit : 1;
+            }
+
+            public int getCalibreSessionLimit() {
+                return calibreSessionLimit > 0 ? calibreSessionLimit : 1;
+            }
+        }
+
+        @Data
+        public static class TimeoutMinutes {
+            private long libreOfficeTimeoutMinutes;
+            private long pdfToHtmlTimeoutMinutes;
+            private long ocrMyPdfTimeoutMinutes;
+            private long pythonOpenCvTimeoutMinutes;
+            private long ghostScriptTimeoutMinutes;
+            private long weasyPrintTimeoutMinutes;
+            private long installAppTimeoutMinutes;
+            private long calibreTimeoutMinutes;
+
+            public long getLibreOfficeTimeoutMinutes() {
+                return libreOfficeTimeoutMinutes > 0 ? libreOfficeTimeoutMinutes : 30;
+            }
+
+            public long getPdfToHtmlTimeoutMinutes() {
+                return pdfToHtmlTimeoutMinutes > 0 ? pdfToHtmlTimeoutMinutes : 20;
+            }
+
+            public long getOcrMyPdfTimeoutMinutes() {
+                return ocrMyPdfTimeoutMinutes > 0 ? ocrMyPdfTimeoutMinutes : 30;
+            }
+
+            public long getPythonOpenCvTimeoutMinutes() {
+                return pythonOpenCvTimeoutMinutes > 0 ? pythonOpenCvTimeoutMinutes : 30;
+            }
+
+            public long getGhostScriptTimeoutMinutes() {
+                return ghostScriptTimeoutMinutes > 0 ? ghostScriptTimeoutMinutes : 30;
+            }
+
+            public long getWeasyPrintTimeoutMinutes() {
+                return weasyPrintTimeoutMinutes > 0 ? weasyPrintTimeoutMinutes : 30;
+            }
+
+            public long getInstallAppTimeoutMinutes() {
+                return installAppTimeoutMinutes > 0 ? installAppTimeoutMinutes : 60;
+            }
+
+            public long getCalibreTimeoutMinutes() {
+                return calibreTimeoutMinutes > 0 ? calibreTimeoutMinutes : 30;
+            }
+        }
+    }
 }