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// $Id$
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/**
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* Copyright (C) 2009 EDIT
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* European Distributed Institute of Taxonomy
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* http://www.e-taxonomy.eu
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*
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* The contents of this file are subject to the Mozilla Public License Version 1.1
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* See LICENSE.TXT at the top of this package for the full license terms.
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*/
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package eu.etaxonomy.cdm.database.update;
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import java.sql.SQLException;
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import java.util.List;
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import org.apache.log4j.Logger;
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import eu.etaxonomy.cdm.common.monitor.IProgressMonitor;
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import eu.etaxonomy.cdm.database.ICdmDataSource;
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import eu.etaxonomy.cdm.model.metadata.CdmMetaData;
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/**
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* Common updater base class for updating schema or terms.
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*
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* @see CdmUpdater
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* @see ISchemaUpdater
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* @see ITermUpdater
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*
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* @author a.mueller
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* @date 16.11.2010
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*
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*/
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public abstract class UpdaterBase<T extends ISchemaUpdaterStep, U extends IUpdater<U>> implements IUpdater<U> {
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private static final Logger logger = Logger.getLogger(TermUpdaterBase.class);
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protected List<T> list;
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protected String startVersion;
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protected String targetVersion;
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protected abstract boolean updateVersion(ICdmDataSource datasource, IProgressMonitor monitor, CaseType caseType) throws SQLException;
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protected abstract String getCurrentVersion(ICdmDataSource datasource, IProgressMonitor monitor, CaseType caseType) throws SQLException;
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@Override
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public int countSteps(ICdmDataSource datasource, IProgressMonitor monitor, CaseType caseType){
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int result = 0;
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//TODO test if previous updater is needed
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if (isToBeInvoked(datasource, monitor, caseType)){
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for (T step: list){
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result++; //+= list.size();
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result += step.getInnerSteps().size();
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}
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if (getPreviousUpdater() != null){
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result += getPreviousUpdater().countSteps(datasource, monitor, caseType);
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}
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}
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return result;
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}
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private boolean isToBeInvoked(ICdmDataSource datasource, IProgressMonitor monitor, CaseType caseType) {
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boolean result = true;
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String datasourceVersion;
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try {
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datasourceVersion = getCurrentVersion(datasource, monitor, caseType);
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} catch (SQLException e1) {
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monitor.warning("SQLException", e1);
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return false;
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}
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boolean isAfterMyStartVersion = isAfterMyStartVersion(datasourceVersion, monitor);
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boolean isBeforeMyStartVersion = isBeforeMyStartVersion(datasourceVersion, monitor);
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// boolean isBeforeMyTargetVersion = isBeforeMyTargetVersion(targetVersion, monitor);
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boolean isBeforeMyTargetVersion = isBeforeMyTargetVersion(targetVersion, monitor);
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boolean isDatasourceBeforeMyTargetVersion = isBeforeMyTargetVersion(datasourceVersion, monitor);
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result &= isDatasourceBeforeMyTargetVersion;
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result &= !(isAfterMyStartVersion && isBeforeMyTargetVersion);
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result &= ! (isBeforeMyStartVersion && getPreviousUpdater() == null);
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result &= !isBeforeMyTargetVersion;
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return result;
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}
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@Override
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public boolean invoke(ICdmDataSource datasource, IProgressMonitor monitor, CaseType caseType) throws Exception{
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String currentLibrarySchemaVersion = CdmMetaData.getDbSchemaVersion();
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return invoke(currentLibrarySchemaVersion, datasource, monitor, caseType);
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}
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@Override
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public boolean invoke(String targetVersion, ICdmDataSource datasource, IProgressMonitor monitor, CaseType caseType) throws Exception{
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boolean result = true;
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String datasourceVersion;
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try {
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datasourceVersion = getCurrentVersion(datasource, monitor, caseType);
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} catch (SQLException e1) {
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monitor.warning("SQLException", e1);
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return false;
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}
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boolean isAfterMyStartVersion = isAfterMyStartVersion(datasourceVersion, monitor);
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boolean isBeforeMyStartVersion = isBeforeMyStartVersion(datasourceVersion, monitor);
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// boolean isAfterMyTargetVersion = isAfterMyTargetVersion(targetVersion, monitor);
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boolean isBeforeMyTargetVersion = isBeforeMyTargetVersion(targetVersion, monitor);
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boolean isDatasourceBeforeMyTargetVersion = isBeforeMyTargetVersion(datasourceVersion, monitor);
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if (! isDatasourceBeforeMyTargetVersion){
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String warning = "Target version ("+targetVersion+") is not before updater target version ("+this.targetVersion+"). Nothing to update.";
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monitor.warning(warning);
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return true;
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}
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if (isAfterMyStartVersion && isBeforeMyTargetVersion){
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String warning = "Database version is higher than updater start version but lower than updater target version";
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RuntimeException exeption = new RuntimeException(warning);
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monitor.warning(warning, exeption);
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throw exeption;
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}
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if (isBeforeMyStartVersion){
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if (getPreviousUpdater() == null){
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String warning = "Database version is before updater version but no previous version updater exists";
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RuntimeException exeption = new RuntimeException(warning);
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monitor.warning(warning, exeption);
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throw exeption;
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}
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result &= getPreviousUpdater().invoke(startVersion, datasource, monitor, caseType);
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}
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if (isBeforeMyTargetVersion){
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String warning = "Target version ("+targetVersion+") is lower than updater target version ("+this.targetVersion+")";
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RuntimeException exeption = new RuntimeException(warning);
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monitor.warning(warning, exeption);
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throw exeption;
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}
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if (result == false){
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return result;
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}
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// datasource.startTransaction(); transaction already started by CdmUpdater
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try {
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for (T step : list){
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result &= handleSingleStep(datasource, monitor, result, step, false, caseType);
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if (result == false){
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break;
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}
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}
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if (result == true){
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result &= updateVersion(datasource, monitor, caseType);
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}else{
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datasource.rollback();
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}
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} catch (Exception e) {
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datasource.rollback();
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logger.error("Error occurred while trying to run updater: " + this.getClass().getName());
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result = false;
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}
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return result;
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}
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// protected abstract boolean handleSingleStep(ICdmDataSource datasource, IProgressMonitor monitor, boolean result, ISchemaUpdaterStep step, boolean isInnerStep) throws Exception;
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protected boolean handleSingleStep(ICdmDataSource datasource, IProgressMonitor monitor, boolean result, ISchemaUpdaterStep step, boolean isInnerStep, CaseType caseType)
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throws Exception {
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try {
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monitor.subTask(step.getStepName());
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Integer invokeResult = step.invoke(datasource, monitor, caseType);
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result &= (invokeResult != null);
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for (ISchemaUpdaterStep innerStep : step.getInnerSteps()){
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result &= handleSingleStep(datasource, monitor, result, innerStep, true, caseType);
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if (!result){
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break;
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}
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}
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// if (! isInnerStep){
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monitor.worked(1);
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// }
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} catch (Exception e) {
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monitor.warning("Monitor: Exception occurred while handling single schema updating step", e);
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datasource.rollback();
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result = false;
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}
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return result;
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}
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protected boolean isAfterMyStartVersion(String dataSourceSchemaVersion, IProgressMonitor monitor) {
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int depth = 4;
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int compareResult = CdmMetaData.compareVersion(dataSourceSchemaVersion, startVersion, depth, monitor);
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return compareResult > 0;
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}
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protected boolean isBeforeMyStartVersion(String dataSourceSchemaVersion, IProgressMonitor monitor) {
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int depth = 4;
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int compareResult = CdmMetaData.compareVersion(dataSourceSchemaVersion, startVersion, depth, monitor);
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return compareResult < 0;
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}
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protected boolean isAfterMyTargetVersion(String dataSourceSchemaVersion, IProgressMonitor monitor) {
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int depth = 4;
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int compareResult = CdmMetaData.compareVersion(dataSourceSchemaVersion, targetVersion, depth, monitor);
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return compareResult > 0;
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}
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protected boolean isBeforeMyTargetVersion(String dataSourceSchemaVersion, IProgressMonitor monitor) {
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int depth = 4;
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int compareResult = CdmMetaData.compareVersion(dataSourceSchemaVersion, targetVersion, depth, monitor);
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return compareResult < 0;
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}
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/* (non-Javadoc)
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* @see eu.etaxonomy.cdm.database.update.IUpdater#getNextUpdater()
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*/
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@Override
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public abstract U getNextUpdater();
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/* (non-Javadoc)
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* @see eu.etaxonomy.cdm.database.update.IUpdater#getPreviousUpdater()
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*/
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@Override
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public abstract U getPreviousUpdater();
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/**
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* @return
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*/
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public String getTargetVersion() {
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return this.targetVersion;
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}
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}
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