io.symcpe.wraith.silo.file.FileRulesStore Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of wraith-silo Show documentation
Wriath state persistence library
There is a newer version: 0.0.34
/**
 * Copyright 2016 Symantec Corporation.
 * 
 * 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 io.symcpe.wraith.silo.file;

import java.io.File;
import java.io.IOException;
import java.nio.file.Files;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import com.google.gson.Gson;

import io.symcpe.wraith.rules.Rule;
import io.symcpe.wraith.rules.RuleCommand;
import io.symcpe.wraith.rules.RuleSerializer;
import io.symcpe.wraith.rules.SimpleRule;
import io.symcpe.wraith.store.RulesStore;

/**
 * @author ambud_sharma
 *
 */
public class FileRulesStore implements RulesStore {

	public static final String CONF_RULES_DIR = "rules.dir";
	private String rulesDirectory;
	private File[] ruleFiles;

	@Override
	public void initialize(Map conf) {
		rulesDirectory = conf.get(CONF_RULES_DIR);
	}

	@Override
	public void connect() throws IOException {
		File rd = new File(rulesDirectory);
		if (!rd.exists()) {
			throw new IOException("Rules directory doesn't exist");
		}
		ruleFiles = rd.listFiles();
	}

	@Override
	public void disconnect() throws IOException {
	}

	@Override
	public Map listRules() throws IOException {
		Map rules = new HashMap<>();
		for (File file : ruleFiles) {
			List lines = Files.readAllLines(file.toPath());
			addRulesFromLines(rules, lines);
		}
		return rules;
	}

	protected void addRulesFromLines(Map rules, List lines) {
		for (String line : lines) {
			if (line == null || line.trim().isEmpty()) {
				continue;
			}
			SimpleRule rule = RuleSerializer.deserializeJSONStringToRule(line);
			rules.put(rule.getRuleId(), rule);
		}
	}

	@Override
	public Map> listGroupedRules() throws IOException {
		Map> rules = new HashMap<>();
		for (File file : ruleFiles) {
			List lines = Files.readAllLines(file.toPath());
			addRulesGroupFromLines(rules, lines);
		}
		return null;
	}

	protected void addRulesGroupFromLines(Map> rules, List lines) {
		Gson gson = new Gson();
		for (String line : lines) {
			if (line == null || line.trim().isEmpty()) {
				continue;
			}
			RuleCommand cmd = gson.fromJson(line, RuleCommand.class);
			SimpleRule rule = RuleSerializer.deserializeJSONStringToRule(cmd.getRuleContent());
			Map grp = rules.get(cmd.getRuleGroup());
			if (grp == null) {
				rules.put(cmd.getRuleGroup(), grp);
			}
			grp.put(rule.getRuleId(), rule);
		}
	}

}