add template node

add tempalte node implementation

Change-Id: Ifd3e6e7f2a7b9ff7029b523eab50274e440652cc
Issue-ID: CCSDK-440
Signed-off-by: Smokowski, Kevin (ks6305) <ks6305@att.com>

6 files changed, 224 insertions, 0 deletions

diff --git a/template-node/provider/src/main/java/org/onap/ccsdk/sli/plugins/template/TemplateNode.java b/template-node/provider/src/main/java/org/onap/ccsdk/sli/plugins/template/TemplateNode.java
new file mode 100644
index 000000000..8a9676817
--- /dev/null
+++ b/template-node/provider/src/main/java/org/onap/ccsdk/sli/plugins/template/TemplateNode.java
@@ -0,0 +1,108 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * openECOMP : SDN-C
+ * ================================================================================
+ * Copyright (C) 2017 AT&T Intellectual Property. All rights
+ * 			reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * 
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.ccsdk.sli.plugins.template;
+
+import java.io.FileInputStream;
+import java.io.StringWriter;
+import java.util.Map;
+import java.util.Properties;
+import org.apache.velocity.Template;
+import org.apache.velocity.VelocityContext;
+import org.apache.velocity.app.VelocityEngine;
+import org.apache.velocity.runtime.RuntimeConstants;
+import org.onap.ccsdk.sli.core.sli.SvcLogicContext;
+import org.onap.ccsdk.sli.core.sli.SvcLogicException;
+import org.onap.ccsdk.sli.core.sli.SvcLogicJavaPlugin;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class TemplateNode implements SvcLogicJavaPlugin {
+    private static final Logger logger = LoggerFactory.getLogger(TemplateNode.class);
+    public final static String TEMPLATE_PATH = "templatePath";
+    public final static String OUTPUT_PATH_KEY = "output";
+    public final static String PREFIX_KEY = "prefix";
+    public final static String REQUIRED_PARAMETERS_ERROR_MESSAGE = "templateName & outputPath are required fields";
+    protected static final String TEMPLATE_PROPERTIES_FILE_NAME = "template-node.properties";
+    protected static final String DEFAULT_PROPERTIES_DIR = "/opt/onap/ccsdk/data/properties";
+    protected static final String PROPERTIES_DIR_KEY = "SDNC_CONFIG_DIR";
+
+    protected VelocityEngine ve;
+
+    public TemplateNode() {
+        ve = new VelocityEngine();
+        setProperties();
+        ve.init();
+    }
+
+    protected void setProperties() {
+        String configDir = System.getProperty(PROPERTIES_DIR_KEY, DEFAULT_PROPERTIES_DIR);
+        Properties props = new Properties();
+
+        try (FileInputStream in = new FileInputStream(configDir + "/" + TEMPLATE_PROPERTIES_FILE_NAME)) {
+            props.load(in);
+        } catch (Exception e) {
+            logger.error("Caught exception loading properties!", e);
+        }
+
+        // give sensible defaults for required properties
+        ve.setProperty(RuntimeConstants.RESOURCE_LOADER, props.getProperty("velocity.resource.loader", "file"));
+        ve.setProperty(RuntimeConstants.FILE_RESOURCE_LOADER_PATH,
+                props.getProperty("velocity.file.resource.loader.path", "/opt/onap/sdnc/restapi/templates"));
+        ve.setProperty(RuntimeConstants.FILE_RESOURCE_LOADER_CACHE,
+                props.getProperty("velocity.file.resource.loader.cache", "false"));
+
+        // allow flexible reading of additional velocity properties
+        for (String propertyName : props.stringPropertyNames()) {
+            if (propertyName.startsWith("velocity")) {
+                logger.error("set " + propertyName.substring(9) + "=" + props.get(propertyName));
+                ve.setProperty(propertyName.substring(9), props.get(propertyName));
+            }
+        }
+    }
+
+    public void evaluateTemplate(Map<String, String> params, SvcLogicContext ctx) throws SvcLogicException {
+        String templateName = params.get(TEMPLATE_PATH);
+        String outputPath = params.get(OUTPUT_PATH_KEY);
+        String prefix = params.get(PREFIX_KEY);
+
+        if (prefix != null && prefix.length() > 0) {
+            outputPath = prefix + "." + outputPath;
+        }
+
+        if (templateName == null || outputPath == null) {
+            throw new SvcLogicException(REQUIRED_PARAMETERS_ERROR_MESSAGE);
+        } else {
+            try {
+                Template template = ve.getTemplate(templateName);
+                VelocityContext context = new VelocityContext();
+                context.put("ctx", ctx);
+                context.put("params", params);
+                StringWriter sw = new StringWriter();
+                template.merge(context, sw);
+                ctx.setAttribute(outputPath, sw.toString());
+            } catch (Exception e) {
+                throw new SvcLogicException(e.getMessage());
+            }
+        }
+    }
+
+}
\ No newline at end of file
diff --git a/template-node/provider/src/main/resources/OSGI-INF/blueprint/blueprint.xml b/template-node/provider/src/main/resources/OSGI-INF/blueprint/blueprint.xml
new file mode 100644
index 000000000..a8006b9b0
--- /dev/null
+++ b/template-node/provider/src/main/resources/OSGI-INF/blueprint/blueprint.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<blueprint xmlns="http://www.osgi.org/xmlns/blueprint/v1.0.0">
+
+	<bean id="templateNode" class="org.onap.ccsdk.sli.plugins.template.TemplateNode" />
+
+	<service id="templateNodeService" ref="templateNode" interface="org.onap.ccsdk.sli.plugins.template.TemplateNode" />
+
+</blueprint>
\ No newline at end of file
diff --git a/template-node/provider/src/test/java/org/onap/ccsdk/sli/plugins/template/MockTemplateNode.java b/template-node/provider/src/test/java/org/onap/ccsdk/sli/plugins/template/MockTemplateNode.java
new file mode 100644
index 000000000..d628ac929
--- /dev/null
+++ b/template-node/provider/src/test/java/org/onap/ccsdk/sli/plugins/template/MockTemplateNode.java
@@ -0,0 +1,7 @@
+package org.onap.ccsdk.sli.plugins.template;
+
+public class MockTemplateNode extends TemplateNode {
+    protected void setProperties() {
+        // do nothing
+    }
+}
diff --git a/template-node/provider/src/test/java/org/onap/ccsdk/sli/plugins/template/TemplateNodeTest.java b/template-node/provider/src/test/java/org/onap/ccsdk/sli/plugins/template/TemplateNodeTest.java
new file mode 100644
index 000000000..29c5c973e
--- /dev/null
+++ b/template-node/provider/src/test/java/org/onap/ccsdk/sli/plugins/template/TemplateNodeTest.java
@@ -0,0 +1,85 @@
+package org.onap.ccsdk.sli.plugins.template;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertTrue;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Vector;
+import org.apache.velocity.runtime.RuntimeConstants;
+import org.junit.Test;
+import org.onap.ccsdk.sli.core.sli.SvcLogicContext;
+import org.onap.ccsdk.sli.core.sli.SvcLogicException;
+
+public class TemplateNodeTest {
+
+    @Test
+    public void sunnyDay() throws Exception {
+        String requestId = "REQ001";
+        String uniqueKey = "UNIQUE_TEST";
+        String action = "uPdaTe";
+        String serviceType = "VPN";
+
+        TemplateNode t = new MockTemplateNode();
+
+        Map<String, String> params = new HashMap<String, String>();
+        params.put(TemplateNode.PREFIX_KEY, "output");
+        params.put(TemplateNode.OUTPUT_PATH_KEY, "mycontainer");
+        params.put(TemplateNode.TEMPLATE_PATH, "src/test/resources/basic.vtl");
+        params.put("service-type", serviceType);
+        SvcLogicContext ctx = new SvcLogicContext();
+        ctx.setAttribute("input.svc-request-id", requestId);
+        ctx.setAttribute("input.unique-key", uniqueKey);
+        ctx.setAttribute("action", action);
+
+        t.evaluateTemplate(params, ctx);
+        String result = ctx.getAttribute("output.mycontainer");
+        assertNotNull(result);
+        assertTrue(result.contains(requestId));
+        assertTrue(result.contains(uniqueKey));
+        assertTrue(result.contains(action.toUpperCase()));
+        assertTrue(result.contains(serviceType));
+    }
+
+    @Test(expected = SvcLogicException.class)
+    public void parameterException() throws Exception {
+        TemplateNode t = new MockTemplateNode();
+        Map<String, String> params = new HashMap<String, String>();
+        SvcLogicContext ctx = new SvcLogicContext();
+        t.evaluateTemplate(params, ctx);
+    }
+
+    @Test(expected = SvcLogicException.class)
+    public void missingTemplate() throws Exception {
+        TemplateNode t = new MockTemplateNode();
+        Map<String, String> params = new HashMap<String, String>();
+        params.put(TemplateNode.PREFIX_KEY, "output");
+        params.put(TemplateNode.OUTPUT_PATH_KEY, "mycontainer");
+        params.put(TemplateNode.TEMPLATE_PATH, "src/test/resources/missing.vtl");
+        SvcLogicContext ctx = new SvcLogicContext();
+        t.evaluateTemplate(params, ctx);
+    }
+
+    @Test
+    public void withProperties() throws Exception {
+        System.setProperty(TemplateNode.PROPERTIES_DIR_KEY, "src/test/resources");
+        TemplateNode t = new TemplateNode();
+        Vector<String> loader = (Vector<String>) t.ve.getProperty(RuntimeConstants.RESOURCE_LOADER);
+        assertTrue(loader.contains("class"));
+        assertEquals("/home/my/example", t.ve.getProperty(RuntimeConstants.FILE_RESOURCE_LOADER_PATH));
+        assertEquals("true", t.ve.getProperty(RuntimeConstants.FILE_RESOURCE_LOADER_CACHE));
+        assertEquals("customValue", t.ve.getProperty("custom.property"));
+    }
+
+    @Test
+    public void withNoProperties() throws Exception {
+        System.setProperty(TemplateNode.PROPERTIES_DIR_KEY, "i/do/not/exist");
+        TemplateNode t = new TemplateNode();
+        Vector<String> loader = (Vector<String>) t.ve.getProperty(RuntimeConstants.RESOURCE_LOADER);
+        assertTrue(loader.contains("file"));
+        assertEquals("/opt/onap/sdnc/restapi/templates", t.ve.getProperty(RuntimeConstants.FILE_RESOURCE_LOADER_PATH));
+        assertEquals("false", t.ve.getProperty(RuntimeConstants.FILE_RESOURCE_LOADER_CACHE));
+        assertEquals(null, t.ve.getProperty("custom.property"));
+    }
+
+}
\ No newline at end of file
diff --git a/template-node/provider/src/test/resources/basic.vtl b/template-node/provider/src/test/resources/basic.vtl
new file mode 100644
index 000000000..63fcc670a
--- /dev/null
+++ b/template-node/provider/src/test/resources/basic.vtl
@@ -0,0 +1,12 @@
+{
+  "input": {
+    "sdnc-request-header": {
+      "svc-request-id": "$ctx.getAttribute("input.svc-request-id")",
+      "svc-action": "$ctx.getAttribute("action").toUpperCase()"
+    },
+    "service-information": {
+      "service-type": "$params.get("service-type")",
+      "service-instance-id": "$ctx.getAttribute("input.unique-key")"
+    }
+  }
+}
\ No newline at end of file
diff --git a/template-node/provider/src/test/resources/template-node.properties b/template-node/provider/src/test/resources/template-node.properties
new file mode 100644
index 000000000..1199a0cde
--- /dev/null
+++ b/template-node/provider/src/test/resources/template-node.properties
@@ -0,0 +1,4 @@
+velocity.resource.loader=class
+velocity.file.resource.loader.path=/home/my/example
+velocity.file.resource.loader.cache=true
+velocity.custom.property=customValue
\ No newline at end of file