Examples with Template org.apache.velocity.Template used on opensource projects

Example 26 with Template

use of org.apache.velocity.Template in project carbon-apimgt by wso2.

the class CustomThrottlePolicyTemplateBuilder method getThrottlePolicyTemplateForCustomPolicy.

/**
 * Generate policy for global level.
 *
 * @return policy template as a string
 * @throws APITemplateException throws if any error occurred
 */
public String getThrottlePolicyTemplateForCustomPolicy() throws APITemplateException {
    if (log.isDebugEnabled()) {
        log.debug("Generating Siddhi app for custom policy :" + customPolicy.toString());
    }
    // get velocity template for custom throttle policy and generate the template
    StringWriter writer = new StringWriter();
    VelocityContext context = new VelocityContext();
    VelocityEngine velocityengine = initVelocityEngine();
    Template template = velocityengine.getTemplate(getTemplatePathForGlobal());
    setConstantContext(context);
    // set values for velocity context
    context.put(POLICY, customPolicy);
    template.merge(context, writer);
    if (log.isDebugEnabled()) {
        log.debug("Generated Siddhi app for policy : " + writer.toString());
    }
    return writer.toString();
}

Example 27 with Template

use of org.apache.velocity.Template in project carbon-apimgt by wso2.

the class SubscriptionThrottlePolicyTemplateBuilder method getThrottlePolicyForSubscriptionLevel.

/**
 * Generate policy for subscription level.
 *
 * @return throttle policies for subscription level
 * @throws APITemplateException throws if generation failure occur
 */
public String getThrottlePolicyForSubscriptionLevel() throws APITemplateException {
    if (log.isDebugEnabled()) {
        log.debug("Generating Siddhi app for subscriptionLevel :" + subscriptionPolicy.toString());
    }
    // get velocity template for Subscription policy and generate the template
    StringWriter writer = new StringWriter();
    VelocityEngine velocityengine = initVelocityEngine();
    Template template = velocityengine.getTemplate(getTemplatePathForSubscription());
    VelocityContext context = new VelocityContext();
    setConstantContext(context);
    // set values for velocity context
    context.put(POLICY, subscriptionPolicy);
    context.put(QUOTA_POLICY, subscriptionPolicy.getDefaultQuotaPolicy());
    template.merge(context, writer);
    if (log.isDebugEnabled()) {
        log.debug("Generated Siddhi app for policy : " + writer.toString());
    }
    return writer.toString();
}

Example 28 with Template

use of org.apache.velocity.Template in project carbon-apimgt by wso2.

the class APIThrottlePolicyTemplateBuilder method getThrottlePolicyTemplateForPipelines.

/**
 * Generate policy for api level throttling
 *
 * @return throttle policies for api level
 * @throws APITemplateException throws if generation failure occur
 */
public Map<String, String> getThrottlePolicyTemplateForPipelines() throws APITemplateException {
    if (log.isDebugEnabled()) {
        log.debug("Generating Siddhi App for apiLevel :" + apiPolicy.toString());
    }
    // get velocity template for API policy pipeline and generate the template
    Map<String, String> policyArray = new HashMap<String, String>();
    StringWriter writer;
    VelocityContext context;
    VelocityEngine velocityengine = initVelocityEngine();
    Template template = velocityengine.getTemplate(getTemplatePathForAPI());
    // Generate template for pipeline conditions if pipelines not null
    if (apiPolicy.getPipelines() != null) {
        for (Pipeline pipeline : apiPolicy.getPipelines()) {
            // set values for velocity context
            context = new VelocityContext();
            setConstantContext(context);
            context.put(PIPELINE_ITEM, pipeline);
            context.put(POLICY, apiPolicy);
            context.put(QUOTA_POLICY, pipeline.getQuotaPolicy());
            context.put(PIPELINE, CONDITION + UNDERSCORE + pipeline.getId());
            String conditionString = getPolicyCondition(pipeline.getConditions());
            context.put(CONDITION, AND + conditionString);
            writer = new StringWriter();
            template.merge(context, writer);
            if (log.isDebugEnabled()) {
                log.debug("Generated Siddhi App : " + writer.toString());
            }
            String policyName = PolicyConstants.POLICY_LEVEL_RESOURCE + UNDERSCORE + apiPolicy.getPolicyName() + UNDERSCORE + CONDITION + UNDERSCORE + pipeline.getId();
            policyArray.put(policyName, writer.toString());
        }
    }
    return policyArray;
}

Example 29 with Template

use of org.apache.velocity.Template in project carbon-apimgt by wso2.

the class GatewaySourceGeneratorImpl method getConfigStringFromTemplate.

@Override
public String getConfigStringFromTemplate(List<TemplateBuilderDTO> apiResources) throws APITemplateException {
    StringWriter writer = new StringWriter();
    String templatePath = "resources" + File.separator + "template" + File.separator + "template.xml";
    try {
        // build the context for template and apply the necessary decorators
        apiConfigContext.validate();
        ConfigContext configContext = new ResourceConfigContext(apiConfigContext, apiResources);
        VelocityContext context = configContext.getContext();
        VelocityEngine velocityengine = new VelocityEngine();
        velocityengine.setProperty(RuntimeConstants.RESOURCE_LOADER, "classpath");
        velocityengine.setProperty("classpath.resource.loader.class", ClasspathResourceLoader.class.getName());
        velocityengine.setProperty(VelocityEngine.RUNTIME_LOG_LOGSYSTEM, new CommonsLogLogChute());
        velocityengine.init();
        Template template = velocityengine.getTemplate(templatePath);
        template.merge(context, writer);
    } catch (ResourceNotFoundException e) {
        log.error("Template " + templatePath + " not Found", e);
        throw new APITemplateException("Template " + templatePath + " not Found", ExceptionCodes.TEMPLATE_EXCEPTION);
    } catch (ParseErrorException e) {
        log.error("Syntax error in " + templatePath, e);
        throw new APITemplateException("Syntax error in " + templatePath, ExceptionCodes.TEMPLATE_EXCEPTION);
    }
    return writer.toString();
}

Example 30 with Template

use of org.apache.velocity.Template in project carbon-apimgt by wso2.

the class GatewaySourceGeneratorImpl method getCompositeAPIConfigStringFromTemplate.

@Override
public String getCompositeAPIConfigStringFromTemplate(List<TemplateBuilderDTO> apiResources, List<CompositeAPIEndpointDTO> compositeApiEndpoints) throws APITemplateException {
    StringWriter writer = new StringWriter();
    String templatePath = "resources" + File.separator + "template" + File.separator + "composite_template.xml";
    try {
        // build the context for template and apply the necessary decorators
        apiConfigContext.validate();
        CompositeAPIConfigContext configContext = new CompositeAPIConfigContext(apiConfigContext, apiResources, compositeApiEndpoints);
        VelocityContext context = configContext.getContext();
        VelocityEngine velocityengine = new VelocityEngine();
        velocityengine.setProperty(RuntimeConstants.RESOURCE_LOADER, "classpath");
        velocityengine.setProperty("classpath.resource.loader.class", ClasspathResourceLoader.class.getName());
        velocityengine.setProperty(VelocityEngine.RUNTIME_LOG_LOGSYSTEM, new CommonsLogLogChute());
        velocityengine.init();
        Template template = velocityengine.getTemplate(templatePath);
        template.merge(context, writer);
    } catch (ResourceNotFoundException e) {
        log.error("Template " + templatePath + " not Found", e);
        throw new APITemplateException("Template " + templatePath + " not Found", ExceptionCodes.TEMPLATE_EXCEPTION);
    } catch (ParseErrorException e) {
        log.error("Syntax error in " + templatePath, e);
        throw new APITemplateException("Syntax error in " + templatePath, ExceptionCodes.TEMPLATE_EXCEPTION);
    }
    return writer.toString();
}