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-rw-r--r--template-node/provider/src/main/java/org/onap/ccsdk/sli/plugins/template/TemplateNode.java108
1 files changed, 108 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 00000000..8a967681
--- /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