#74 New command for verifying server version

src/main/java/com/marklogic/appdeployer/command/admin/RequireAtLeastMl8Command.java

@@ -0,0 +1,32 @@
+package com.marklogic.appdeployer.command.admin;
+
+import com.marklogic.appdeployer.command.AbstractCommand;
+import com.marklogic.appdeployer.command.CommandContext;
+
+/**
+ * Version 2.+ of ml-app-deployer requires at least version 8.x of MarkLogic. There are features in ml-app-deployer 2.x
+ * - such as support for alerts and triggers - that require a certain version of 8, but we at least want to make sure
+ * that no one tries to run this against ML 7 or an older version.
+ */
+public class RequireAtLeastMl8Command extends AbstractCommand {
+
+    @Override
+    public void execute(CommandContext context) {
+        int major = 0;
+        try {
+            String version = context.getAdminManager().getServerVersion();
+            if (logger.isInfoEnabled()) {
+                logger.info("Verifying MarkLogic version is at least 8 or higher; version: " + version);
+            }
+            major = Integer.parseInt(version.split("\\.")[0]);
+        } catch (Exception e) {
+            logger.warn("Unable to verify MarkLogic version is 8 or higher, will continue with deployment; error: "
+                    + e.getMessage());
+            major = 8;
+        }
+        if (major < 8) {
+            throw new RuntimeException("Only MarkLogic versions 8 and higher are supported");
+        }
+    }
+
+}

src/main/java/com/marklogic/mgmt/admin/AdminManager.java

@@ -12,6 +12,7 @@
 import org.springframework.web.client.RestTemplate;
 
 import com.marklogic.mgmt.AbstractManager;
+import com.marklogic.rest.util.Fragment;
 import com.marklogic.rest.util.RestTemplateUtil;
 
 public class AdminManager extends AbstractManager {
@@ -197,6 +198,14 @@ public boolean execute() {
         });
     }
 
+    public Fragment getServerConfig() {
+        return new Fragment(restTemplate.getForObject(adminConfig.getBaseUrl() + "/admin/v1/server-config", String.class));
+    }
+
+    public String getServerVersion() {
+        return getServerConfig().getElementValue("/m:host/m:version");
+    }
+
     public void setWaitForRestartCheckInterval(int waitForRestartCheckInterval) {
         this.waitForRestartCheckInterval = waitForRestartCheckInterval;
     }

src/test/java/com/marklogic/appdeployer/command/admin/RequireAtLeastMl8Test.java

@@ -0,0 +1,14 @@
+package com.marklogic.appdeployer.command.admin;
+
+import org.junit.Test;
+
+import com.marklogic.appdeployer.AbstractAppDeployerTest;
+
+public class RequireAtLeastMl8Test extends AbstractAppDeployerTest {
+
+    @Test
+    public void testThatNoExceptionIsThrown() {
+        initializeAppDeployer(new RequireAtLeastMl8Command());
+        appDeployer.deploy(appConfig);
+    }
+}