<feature>[externalservice]: add external service capabilities

Resolves: ZSTAC-43334

Change-Id: I6b6e76646f7473636d6d7264646d64676b68656d
Signed-off-by: AlanJager <[email protected]>

Author: AlanJager

core/src/main/java/org/zstack/core/externalservice/ExternalService.java

@@ -1,5 +1,7 @@
 package org.zstack.core.externalservice;
 
+import org.zstack.header.core.external.service.ExternalServiceCapabilities;
+
 public interface ExternalService {
     String getName();
 
@@ -10,4 +12,8 @@ public interface ExternalService {
     void restart();
 
     boolean isAlive();
+
+    ExternalServiceCapabilities getExternalServiceCapabilities();
+
+    void reload();
 }

core/src/main/java/org/zstack/core/externalservice/ExternalServiceCapabilitiesBuilder.java

@@ -0,0 +1,14 @@
+package org.zstack.core.externalservice;
+
+import org.zstack.header.core.external.service.ExternalServiceCapabilities;
+
+public class ExternalServiceCapabilitiesBuilder extends ExternalServiceCapabilities {
+    public static ExternalServiceCapabilitiesBuilder build() {
+        return new ExternalServiceCapabilitiesBuilder();
+    }
+
+    public ExternalServiceCapabilitiesBuilder reloadConfig(boolean reloadConfig) {
+        setReloadConfig(reloadConfig);
+        return this;
+    }
+}

externalservice/src/main/java/org/zstack/externalservice/cronjob/CronJobImpl.java

@@ -4,6 +4,8 @@
 import org.apache.commons.lang.StringUtils;
 import org.zstack.core.Platform;
 import org.zstack.core.externalservice.AbstractLocalExternalService;
+import org.zstack.header.core.external.service.ExternalServiceCapabilities;
+import org.zstack.core.externalservice.ExternalServiceCapabilitiesBuilder;
 import org.zstack.header.errorcode.OperationFailureException;
 import org.zstack.header.exception.CloudRuntimeException;
 import org.zstack.utils.Bash;
@@ -17,6 +19,10 @@
 import java.util.Set;
 
 public class CronJobImpl extends AbstractLocalExternalService implements CronJob {
+    ExternalServiceCapabilities capabilities = ExternalServiceCapabilitiesBuilder
+            .build()
+            .reloadConfig(true);
+
     @Override
     protected String[] getCommandLineKeywords() {
         return new String[] {"crond", "-n"};
@@ -48,6 +54,27 @@ public boolean isAlive() {
         return getPID() != null;
     }
 
+    @Override
+    public ExternalServiceCapabilities getExternalServiceCapabilities() {
+        return capabilities;
+    }
+
+    @Override
+    public void reload() {
+        if (!isAlive()) {
+            throw new OperationFailureException(operr("crond is not running"));
+        }
+
+        new Bash() {
+            @Override
+            protected void scripts() {
+                setE();
+
+                run("service crond reload");
+            }
+        }.execute();
+    }
+
     @Override
     public void addJob(String job) {
         if (!isAlive()) {

header/src/main/java/org/zstack/header/core/external/service/ExternalServiceCapabilities.java

@@ -0,0 +1,13 @@
+package org.zstack.header.core.external.service;
+
+public class ExternalServiceCapabilities {
+    private boolean reloadConfig = false;
+
+    public boolean isReloadConfig() {
+        return reloadConfig;
+    }
+
+    public void setReloadConfig(boolean reloadConfig) {
+        this.reloadConfig = reloadConfig;
+    }
+}