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Java implementation of the Ethereum protocol adapted to use for Hedera Smart Contract Service
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/*
* Copyright (c) [2016] [ ]
* This file is part of the ethereumJ library.
*
* The ethereumJ library is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* The ethereumJ library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with the ethereumJ library. If not, see .
*/
package org.ethereum.config;
import org.ethereum.net.eth.EthVersion;
import org.ethereum.net.shh.ShhHandler;
import org.ethereum.net.swarm.bzz.BzzHandler;
import org.ethereum.util.BuildInfo;
import org.ethereum.util.FileUtil;
import org.ethereum.util.Utils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.config.BeanPostProcessor;
import java.io.*;
import java.util.Properties;
/**
* Created by Anton Nashatyrev on 13.05.2016.
*/
class Initializer implements BeanPostProcessor {
private static final Logger logger = LoggerFactory.getLogger("general");
// Util to ensure database directory is compatible with code
private DatabaseVersionHandler databaseVersionHandler = new DatabaseVersionHandler();
/**
* Method to be called right after the config is instantiated.
* Effectively is called before any other bean is initialized
*/
private void initConfig(SystemProperties config) {
logger.info("Running {}, core version: {}-{}", config.genesisInfo(), config.projectVersion(), config.projectVersionModifier());
BuildInfo.printInfo();
databaseVersionHandler.process(config);
if (logger.isInfoEnabled()) {
StringBuilder versions = new StringBuilder();
for (EthVersion v : EthVersion.supported()) {
versions.append(v.getCode()).append(", ");
}
versions.delete(versions.length() - 2, versions.length());
logger.info("capability eth version: [{}]", versions);
}
logger.info("capability shh version: [{}]", ShhHandler.VERSION);
logger.info("capability bzz version: [{}]", BzzHandler.VERSION);
// forcing loading blockchain config
config.getBlockchainConfig();
logger.info("Blockchain config {}", config.getBlockchainConfig().toString());
// forcing loading genesis to fail fast in case of error
config.getGenesis();
// forcing reading private key or generating it in database directory
config.nodeId();
}
@Override
public Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException {
if (bean instanceof SystemProperties) {
initConfig((SystemProperties) bean);
}
return bean;
}
@Override
public Object postProcessAfterInitialization(Object bean, String beanName) throws BeansException {
return bean;
}
/**
* We need to persist the DB version, so after core upgrade we can either reset older incompatible db
* or make a warning and let the user reset DB manually.
* Database version is stored in ${database}/version.properties
* Logic will assume that database has version 1 if file with version is absent.
*/
public static class DatabaseVersionHandler {
public enum Behavior {
EXIT, RESET, IGNORE
}
public void process(SystemProperties config) {
if (config.getKeyValueDataSource().equals("leveldb"))
Utils.showWarn(
"Deprecated database engine detected",
"'leveldb' support will be removed in one of the next releases",
"thus it is strongly recommended to stick with 'rocksdb' instead"
);
if (config.databaseReset() && config.databaseResetBlock() == 0){
FileUtil.recursiveDelete(config.databaseDir());
putDatabaseVersion(config, config.databaseVersion());
logger.info("Database reset done");
System.out.println("Database reset done");
}
final File versionFile = getDatabaseVersionFile(config);
final Behavior behavior = Behavior.valueOf(
config.getProperty("database.incompatibleDatabaseBehavior", Behavior.EXIT.toString()).toUpperCase());
// Detect database version
final Integer expectedVersion = config.databaseVersion();
if (isDatabaseDirectoryExists(config)) {
final Integer actualVersionRaw = getDatabaseVersion(versionFile);
final boolean isVersionFileNotFound = actualVersionRaw.equals(-1);
final Integer actualVersion = isVersionFileNotFound ? 1 : actualVersionRaw;
if (actualVersionRaw.equals(-1)) {
putDatabaseVersion(config, actualVersion);
}
if (actualVersion.equals(expectedVersion) || (isVersionFileNotFound && expectedVersion.equals(1))) {
logger.info("Database directory location: '{}', version: {}", config.databaseDir(), actualVersion);
} else {
logger.warn("Detected incompatible database version. Detected:{}, required:{}", actualVersion, expectedVersion);
if (behavior == Behavior.EXIT) {
Utils.showErrorAndExit(
"Incompatible database version " + actualVersion,
"Please remove database directory manually or set `database.incompatibleDatabaseBehavior` to `RESET`",
"Database directory location is " + config.databaseDir()
);
} else if (behavior == Behavior.RESET) {
boolean res = FileUtil.recursiveDelete(config.databaseDir());
if (!res) {
throw new RuntimeException("Couldn't delete database dir: " + config.databaseDir());
}
putDatabaseVersion(config, config.databaseVersion());
logger.warn("Auto reset database directory according to flag");
} else {
// IGNORE
logger.info("Continue working according to flag");
}
}
} else {
putDatabaseVersion(config, config.databaseVersion());
logger.info("Created database version file");
}
}
public boolean isDatabaseDirectoryExists(SystemProperties config) {
final File databaseFile = new File(config.databaseDir());
return databaseFile.exists() && databaseFile.isDirectory() && databaseFile.list().length > 0;
}
/**
* @return database version stored in specific location in database dir
* or -1 if can't detect version due to error
*/
public Integer getDatabaseVersion(File file) {
if (!file.exists()) {
return -1;
}
try (Reader reader = new FileReader(file)) {
Properties prop = new Properties();
prop.load(reader);
return Integer.valueOf(prop.getProperty("databaseVersion"));
} catch (Exception e) {
logger.error("Problem reading current database version.", e);
return -1;
}
}
public void putDatabaseVersion(SystemProperties config, Integer version) {
final File versionFile = getDatabaseVersionFile(config);
versionFile.getParentFile().mkdirs();
try (Writer writer = new FileWriter(versionFile)) {
Properties prop = new Properties();
prop.setProperty("databaseVersion", version.toString());
prop.store(writer, "Generated database version");
} catch (Exception e) {
throw new Error("Problem writing current database version ", e);
}
}
private File getDatabaseVersionFile(SystemProperties config) {
return new File(config.databaseDir() + "/version.properties");
}
}
}