ContentServiceImpl.java

/*
 * Copyright 2019 Global Crop Diversity Trust
 *
 * 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.
 */

package org.genesys.server.service.impl;

import java.io.StringWriter;
import java.io.Writer;
import java.util.Locale;
import java.util.Map;
import org.genesys.blocks.auditlog.service.ClassPKService;
import org.genesys.blocks.model.ClassPK;
import org.genesys.server.service.ContentService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Isolation;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.validation.annotation.Validated;
import org.apache.velocity.VelocityContext;
import org.apache.velocity.app.VelocityEngine;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

@Service
@Validated
public class ContentServiceImpl implements ContentService {
	public static final Logger LOG = LoggerFactory.getLogger(ContentServiceImpl.class);

	@Autowired
	private ClassPKService classPkService;

	@Autowired
	private VelocityEngine velocityEngine;

	@Override
	public Locale getDefaultLocale() {
		return Locale.ENGLISH;
	}

	@Override
	public ClassPK getClassPk(Class<?> clazz) {
		return classPkService.getClassPk(clazz);
	}

	@Override
	public ClassPK getClassPk(String shortName) {
		return classPkService.findByShortName(shortName);
	}

	@Override
	@Transactional(isolation = Isolation.READ_UNCOMMITTED)
	public synchronized ClassPK ensureClassPK(Class<?> clazz) {
		return classPkService.getClassPk(clazz);
	}

	@Override
	public String processTemplate(String templateStr, Map<String, Object> root) {
		final StringWriter swOut = new StringWriter();
		processTemplate(templateStr, root, swOut);
		if (LOG.isTraceEnabled()) {
			LOG.trace(swOut.toString());
		}
		return swOut.toString();
	}

	@Override
	public void processTemplate(String templateStr, Map<String, Object> root, Writer writer) {
		final VelocityContext context = new VelocityContext();
		for (final var entry : root.entrySet()) {
			context.put(entry.getKey(), entry.getValue());
		}
		context.put("esc", new org.apache.velocity.tools.generic.EscapeTool());

		/**
		 * Merge data and template
		 */
		velocityEngine.evaluate(context, writer, "log tag name", templateStr);
	}


}