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/*
* Copyright 2003 - 2012 The eFaps Team
*
* 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.
*
* Revision: $Rev: 7483 $
* Last Changed: $Date: 2012-05-11 11:57:38 -0500 (Fri, 11 May 2012) $
* Last Changed By: $Author: [email protected] $
*/
package org.efaps.admin.common;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Formatter;
import java.util.Locale;
import java.util.Map;
import java.util.UUID;
import org.efaps.db.Context;
import org.efaps.db.transaction.ConnectionResource;
import org.efaps.db.wrapper.SQLSelect;
import org.efaps.util.EFapsException;
import org.efaps.util.cache.AbstractCache;
import org.efaps.util.cache.CacheObjectInterface;
import org.efaps.util.cache.CacheReloadException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* TODO comment!
*
* @author The eFaps Team
* @version $Id: NumberGenerator.java 7483 2012-05-11 16:57:38Z [email protected] $
*/
public final class NumberGenerator
implements CacheObjectInterface
{
/**
* Select statement that will be executed against the database
* on reading the cache.
*/
private static SQLSelect SQL_SELECT = new SQLSelect()
.column(0, "ID")
.column(1, "NAME")
.column(1, "UUID")
.column(0, "FORMAT")
.from("T_CMNUMGEN", 0)
.leftJoin("T_CMABSTRACT", 1, "ID", 0, "ID");
/**
* Stores all instances of type.
*
* @see #get
*/
private static NumberGeneratorCache CACHE = new NumberGeneratorCache();
/**
* Logging instance used in this class.
*/
private static final Logger LOG = LoggerFactory.getLogger(NumberGenerator.class);
/**
* Prefix for the name used in the database.
*/
private static final String NAME_PREFIX = "numgen_";
/**
* Suffix for the name used in the database.
*/
private static final String NAME_SUFFIX = "_seq";
/**
* Id of this NumberGenerator.
*/
private final long id;
/**
* Name of this NumberGenerator.
*/
private final String name;
/**
* UUID of this NumberGenerator.
*/
private final UUID uuid;
/**
* Format for this NumberGenerator.
*/
private final String format;
/**
* @param _id Id of this NumberGenerator.
* @param _name Name of this NumberGenerator.
* @param _uuid UUID of this NumberGenerator.
* @param _format format of this NumberGenerator.
*/
private NumberGenerator(final long _id,
final String _name,
final String _uuid,
final String _format)
{
this.id = _id;
this.name = _name;
this.uuid = UUID.fromString(_uuid);
this.format = _format;
}
/**
* Get the name used for this sequence in the database.
* @return name of this sequence in the database;
*/
public String getDBName()
{
return NumberGenerator.NAME_PREFIX + this.id + NumberGenerator.NAME_SUFFIX;
}
/**
* Method to get the next value for this sequence.
* To get the long value use {@link #getNextValAsLong()}
* @return next value for this sequence
* @throws EFapsException on error
*/
public String getNextVal()
throws EFapsException
{
return getNextVal(new Object[0]);
}
/**
* Method to get the next value for this sequence.
* Including additional format information.
* To get the long value use {@link #getNextValAsLong()}
* @param _args arguments for the formatter
* @return next value for this sequence
* @throws EFapsException on error
*/
public String getNextVal(final Object... _args)
throws EFapsException
{
final Object[] args = new Object[_args.length + 1];
try {
final long val = Context.getDbType().nextSequence(Context.getThreadContext().getConnection(), getDBName());
args[0] = val;
} catch (final SQLException e) {
throw new EFapsException(NumberGenerator.class, " getNextVal()", e);
}
for (int i = 0; i < _args.length; i++) {
args[i + 1] = _args[i];
}
final Locale local = Context.getThreadContext().getLocale();
final Formatter formatter = new Formatter(local);
formatter.format(this.format, args);
return formatter.toString();
}
/**
* Method to get the next long value for this sequence.
* To get the formated value use {@link #getNextVal()}
* @return next value for this sequence
* @throws EFapsException on error
*/
public Long getNextValAsLong()
throws EFapsException
{
long ret = 0;
try {
ret = Context.getDbType().nextSequence(Context.getThreadContext().getConnection(), getDBName());
} catch (final SQLException e) {
throw new EFapsException(NumberGenerator.class, " getNextValAsLong()", e);
}
return ret;
}
/**
* Set the value for the numberGenerator. The next call of
* {@link #getNextVal()} or {@link #getNextVal()} normally will
* return the value + 1.
* @param _value value for the sequence
* @throws EFapsException on error
*/
public void setVal(final String _value)
throws EFapsException
{
try {
Context.getDbType().setSequence(Context.getThreadContext().getConnection(), getDBName(),
Long.valueOf(_value));
} catch (final SQLException e) {
throw new EFapsException(NumberGenerator.class, "setVal()", e);
}
}
/**
* {@inheritDoc}
*/
@Override
public long getId()
{
return this.id;
}
/**
* {@inheritDoc}
*/
@Override
public String getName()
{
return this.name;
}
/**
* {@inheritDoc}
*/
@Override
public UUID getUUID()
{
return this.uuid;
}
/**
* Method to initialize the Cache of this CacheObjectInterface.
*
* @throws CacheReloadException on error
*/
public static void initialize()
throws CacheReloadException
{
NumberGenerator.initialize(NumberGenerator.class);
}
/**
* Method to initialize the Cache of this CacheObjectInterface.
*
* @param _class class that called the method
* @throws CacheReloadException on error
*/
public static void initialize(final Class _class)
throws CacheReloadException
{
NumberGenerator.CACHE.initialize(_class);
}
/**
* Returns for given parameter _id the instance of class Type.
* .
*
* @param _id id of the type to get
* @return instance of class {@link Type}
* @throws CacheReloadException
*/
public static NumberGenerator get(final long _id)
{
return NumberGenerator.CACHE.get(_id);
}
/**
* Returns for given parameter _name the instance of class
* {@link Type}.
*
* @param _name name of the type to get
* @return instance of class {@link Type}
* @throws CacheReloadException
*/
public static NumberGenerator get(final String _name)
{
return NumberGenerator.CACHE.get(_name);
}
/**
* Returns for given parameter _uuid the instance of class
* {@link Type}.
*
* @param _uuid uuid of the type to get
* @return instance of class {@link Type}
* @throws CacheReloadException
*/
public static NumberGenerator get(final UUID _uuid)
{
return NumberGenerator.CACHE.get(_uuid);
}
/**
* Static getter method for the type hashtable {@link #CACHE}.
*
* @return value of static variable {@link #CACHE}
*/
public static AbstractCache getTypeCache()
{
return NumberGenerator.CACHE;
}
/**
* Cache for Types.
*/
private static class NumberGeneratorCache extends AbstractCache
{
/**
* {@inheritDoc}
*/
@Override
protected void readCache(final Map _cache4Id,
final Map _cache4Name,
final Map _cache4UUID)
throws CacheReloadException
{
ConnectionResource con = null;
try {
con = Context.getThreadContext().getConnectionResource();
Statement stmt = null;
try {
stmt = con.getConnection().createStatement();
final ResultSet rs = stmt.executeQuery(NumberGenerator.SQL_SELECT.getSQL());
while (rs.next()) {
final long id = rs.getLong(1);
final String name = rs.getString(2).trim();
final String uuid = rs.getString(3).trim();
final String format = rs.getString(4).trim();
if (NumberGenerator.LOG.isDebugEnabled()) {
NumberGenerator.LOG.debug("read NumberGenerator '" + name + "' (id = " + id
+ ") + format = " + format);
}
final NumberGenerator generator = new NumberGenerator(id, name, uuid, format);
_cache4Id.put(generator.getId(), generator);
_cache4Name.put(generator.getName(), generator);
_cache4UUID.put(generator.getUUID(), generator);
}
rs.close();
} finally {
if (stmt != null) {
stmt.close();
}
}
con.commit();
} catch (final SQLException e) {
throw new CacheReloadException("could not read NumberGenerator", e);
} catch (final EFapsException e) {
throw new CacheReloadException("could not read NumberGenerator", e);
} finally {
if ((con != null) && con.isOpened()) {
try {
con.abort();
} catch (final EFapsException e) {
throw new CacheReloadException("could not read NumberGenerator", e);
}
}
}
}
}
}
