基于xml配置插入数据库数据例子(一)

(1) package net.atpco.dds.offline.filing.common.datamapper.binder
1.ClassInfo
package net.atpco.dds.offline.filing.common.datamapper.binder;

import java.lang.reflect.Method;
import java.util.Collection;
import java.util.HashMap;
import java.util.Locale;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;

import org.apache.log4j.Logger;

/**
* This class represents a cached set of class definition information that
* allows for easy mapping between property names and getter methods.
*/
public final class ClassInfo {
/** logger */
private static final Logger LOGGER = Logger.getLogger(ClassInfo.class);

private transient final Map<String,Invoker> getMethods = new ConcurrentHashMap<String,Invoker>();
private transient final Map<String,Class<?>> getTypes = new ConcurrentHashMap<String,Class<?>>();

private final transient String className;

public ClassInfo(final Class<?> clazz) {
className = clazz.getName();
addGetMethods(clazz);
}

/**
* Add the get methods based on the java bean naming standard.
* Allowed methods are is and getters method only.
* @param cls
*/
private void addGetMethods(final Class<?> cls) {
final Method[] methods = getClassMethods(cls);
for (int i = 0; i < methods.length; i++) {
final Method method = methods[i];
String name = method.getName();
if (name.startsWith("get") && name.length() > 3) {
if (method.getParameterTypes().length == 0) {
name = dropCase(name);
addGetMethod(name,method);
}
} else if (name.startsWith("is") && name.length() > 2
&& method.getParameterTypes().length == 0) {
name = dropCase(name);
addGetMethod(name,method);
}
}
}

/**
* Add the method to the map.
* @param name
* @param method
*/
private void addGetMethod(final String name,final Method method) {
getMethods.put(name,new MethodInvoker(method));
getTypes.put(name,method.getReturnType());
}

/**
* This method returns an array containing all methods declared in this
* class and any superclass. We use this method,instead of the simpler
* Class.getMethods(),because we want to look for private methods as well.
*
* @param cls
* The class
* @return An array containing all methods in this class
*/
private Method[] getClassMethods(final Class<?> cls) {
final Map<String,Method> uniqueMethods = new HashMap<String,Method>();
Class<?> currentClass = cls;
while (currentClass != null) {
addUniqueMethods(uniqueMethods,currentClass.getDeclaredMethods());

// we also need to look for interface methods -
// because the class may be abstract
final Class<?>[] interfaces = currentClass.getInterfaces();
for (int i = 0; i < interfaces.length; i++) {
addUniqueMethods(uniqueMethods,interfaces[i].getMethods());
}

currentClass = currentClass.getSuperclass();
}

final Collection<Method> methods = uniqueMethods.values();

return methods.toArray(new Method[methods.size()]);
}

/**
* Add the unique method to the map. There is a possibility that
* the class might be inherited.
* @param uniqueMethods
* @param methods
*/
private void addUniqueMethods(final Map<String,Method> uniqueMethods,
final Method[] methods) {
for (final Method currentMethod : methods) {
if (!currentMethod.isBridge()) {
final String signature = getSignature(currentMethod);
// check to see if the method is already known
// if it is known,then an extended class must have
// overridden a method
if (!uniqueMethods.containsKey(signature)) {
currentMethod.setAccessible(true);
uniqueMethods.put(signature,currentMethod);
}
}
}
}

/**
* Get the method signature.
* @param method
* @return
*/
private String getSignature(final Method method) {
final StringBuffer strBuf = new StringBuffer();
strBuf.append(method.getName());
final Class<?>[] parameters = method.getParameterTypes();

for (int i = 0; i < parameters.length; i++) {
if (i == 0) {
strBuf.append(':');
} else {
strBuf.append(',');
}
strBuf.append(parameters[i].getName());
}

return strBuf.toString();
}

/**
* Adding only the method name by dropping the is and get word
* @param methodName
* @return
*/
private static String dropCase(final String methodName) {
String mName;
if (methodName.startsWith("get")) {
mName = methodName.substring(3);

} else {
mName = methodName.substring(2);
}

if (mName.length() == 1
|| mName.length() > 1 && !Character.isUpperCase(mName
.charAt(1))) {
mName = mName.substring(0,1).toLowerCase(Locale.US)
+ mName.substring(1);
}

return mName;
}

/**
* Returns the getter invoker object
* @param propertyName
* @return
*/
public Invoker getGetInvoker(final String propertyName) {
final Invoker method = getMethods.get(propertyName);
if (method == null) {
LOGGER.info("There is no READABLE property named '" + propertyName
+ "' in class '" + className + "'");
}
return method;
}
}

2.DataLoadConfig
package net.atpco.dds.offline.filing.common.datamapper.binder;

import java.sql.Types;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;

import javax.annotation.PostConstruct;

import net.atpco.dds.offline.filing.common.datamapper.parser.ClassConfig;

import org.apache.log4j.Logger;
import org.springframework.context.annotation.Scope;
import org.springframework.stereotype.Component;

@Component("dataLoadConfig")
@Scope("singleton")
public class DataLoadConfig {
/** logger */
private static Logger LOGGER = Logger.getLogger(DataLoadConfig.class);
private transient final Map<String,Integer> JDBC_TYPE_MAP = new ConcurrentHashMap<String,Integer>();
private transient final Map<String,String> sql_CACHE = new ConcurrentHashMap<String,String>();
private transient final Map<String,ClassConfig> MAPPING_CONFIG = new ConcurrentHashMap<String,ClassConfig>();
private transient final Map<Class<?>,ClassInfo> CLASS_INFO_MAP = new ConcurrentHashMap<Class<?>,ClassInfo>();
@PostConstruct
public void initialize() {
JDBC_TYPE_MAP.put("BIGINT",Types.BIGINT);
JDBC_TYPE_MAP.put("CHAR",Types.CHAR);
JDBC_TYPE_MAP.put("DATE",Types.DATE);
JDBC_TYPE_MAP.put("DECIMAL",Types.DECIMAL);
JDBC_TYPE_MAP.put("DOUBLE",Types.DOUBLE);
JDBC_TYPE_MAP.put("FLOAT",Types.FLOAT);
JDBC_TYPE_MAP.put("INTEGER",Types.INTEGER);
JDBC_TYPE_MAP.put("JAVA_OBJECT",Types.JAVA_OBJECT);
JDBC_TYPE_MAP.put("LONGVARBINARY",Types.LONGVARBINARY);
JDBC_TYPE_MAP.put("LONGVARCHAR",Types.LONGVARCHAR);
JDBC_TYPE_MAP.put("NULL",Types.NULL);
JDBC_TYPE_MAP.put("NUMERIC",Types.NUMERIC);
JDBC_TYPE_MAP.put("OTHER",Types.OTHER);
JDBC_TYPE_MAP.put("SMALLINT",Types.SMALLINT);
JDBC_TYPE_MAP.put("STRUCT",Types.STRUCT);
JDBC_TYPE_MAP.put("TIME",Types.TIME);
JDBC_TYPE_MAP.put("TIMESTAMP",Types.TIMESTAMP);
JDBC_TYPE_MAP.put("TIMESTMP",Types.TIMESTAMP);
JDBC_TYPE_MAP.put("TINYINT",Types.TINYINT);
JDBC_TYPE_MAP.put("VARBINARY",Types.VARBINARY);
JDBC_TYPE_MAP.put("VARCHAR",Types.VARCHAR);
}

/**
* Returns the jdbc type
* @param jdbcTypeName
* @return
*/
public Integer getJdbcType(final String jdbcTypeName) {
if(JDBC_TYPE_MAP !=null && JDBC_TYPE_MAP.containsKey(jdbcTypeName)) {
return JDBC_TYPE_MAP.get(jdbcTypeName);
}
return null;
}

/**
* Gets an instance of ClassInfo for the specified class.
*
* @param clazz
* The class for which to lookup the method cache.
* @return The method cache for the class
*/
public ClassInfo getClassInfo(final Class<?> clazz) {
synchronized (clazz) {
ClassInfo cached = CLASS_INFO_MAP.get(clazz);
if (cached == null) {
cached = new ClassInfo(clazz);
CLASS_INFO_MAP.put(clazz,cached);
}
return cached;
}
}

/**
* Get the class config object
* @param identifier
* @return
*/
public ClassConfig getClassConfig(final String identifier) {
return MAPPING_CONFIG.get(identifier);
}

/**
* Set the class config object based on the identifier
* @param identifier
* @param config
*/
public void setClassConfig(final String identifier,
final ClassConfig config) {
if(MAPPING_CONFIG.containsKey(identifier)) {
LOGGER.warn("Identifier: " + identifier + " already exists ");
}
MAPPING_CONFIG.put(identifier,config);
}

/**
* Get the sql from cache if its already compiled
* @param identifier
* @return
*/
public String getsqlFromCache(final String identifier) {
return sql_CACHE.get(identifier);
}

/**
* Set the sql into cache
* @param identifier
* @param sql
*/
public void setsqlIntoCache(final String identifier,final String sql) {
sql_CACHE.put(identifier,sql);
}
}

3.DataLoadDAO
package net.atpco.dds.offline.filing.common.datamapper.binder;

import org.springframework.jdbc.core.namedparam.sqlParameterSource;

public interface DataLoadDAO {
int[] batchUpdate(String sql,sqlParameterSource[] paramSource);
}

4.DataLoadDAOImpl
package net.atpco.dds.offline.filing.common.datamapper.binder;

import java.util.Map;
import java.util.Map.Entry;

import org.apache.log4j.Logger;
import org.springframework.jdbc.core.sqlParameterValue;
import org.springframework.jdbc.core.namedparam.MapsqlParameterSource;
import org.springframework.jdbc.core.namedparam.sqlParameterSource;
import org.springframework.stereotype.Repository;
import org.springframework.transaction.annotation.Propagation;
import org.springframework.transaction.annotation.Transactional;

/**
* Responsible for persisting the data into database as a batch
*
* @author atp1axi
* @version 1.0
*
*/
@Repository("dataLoadDAO")
public class DataLoadDAOImpl extends DDSDAO implements DataLoadDAO {
/** logger */
private static final Logger LOGGER = Logger.getLogger(DataLoadDAOImpl.class);

/**
* Do a batch update. The parameters are configured sql paramter source.
*
* @param sql
* - Inser/update sql
* @param paramSource
* - Mapsqlparametersource,eventually it will set the values in
* prepared statement.
*/
@Override
@Transactional(propagation = Propagation.required)
public int[] batchUpdate(final String sql,
final sqlParameterSource[] paramSource) {
System.out.println("keys and values====");
for (int i = 0; i < paramSource.length; i++) {
System.out.println("sql==" + sql);
MapsqlParameterSource ps = (MapsqlParameterSource) paramSource[i];
Map<String,Object> objectMap = ps.getValues();
for (Entry<String,Object> entry : objectMap.entrySet()) {
sqlParameterValue rr = (sqlParameterValue) entry.getValue();
System.out.println(entry.getKey() + " : " + rr.getValue()
+ "=====");
System.out.println(rr.getValue() == null ? "null" : rr
.getValue().getClass());
}
}

return namedJdbcTemplate.batchUpdate(sql,paramSource);
}

}

5.DataLoadRequest
package net.atpco.dds.offline.filing.common.datamapper.binder;

import java.util.List;

import org.springframework.util.CollectionUtils;

public class DataLoadRequest {

public DataLoadRequest(final Mode mode,final String identifier,
final List<?> objects) {
this.mode = mode;
this.identifier = identifier;
this.dataList = objects;
}

private Mode mode;
private String identifier;
private List<?> dataList;

public void setMode(final Mode mode) {
this.mode = mode;
}

public void setIdentifier(final String identifier) {
this.identifier = identifier;
}

public void setDataList(final List<?> dataList) {
this.dataList = dataList;
}

public Mode getMode() {
return mode;
}

public String getIdentifier() {
return identifier;
}

public List<?> getDataList() {
return dataList;
}

public boolean isValid() {
boolean isValid;
if (mode == null || CollectionUtils.isEmpty(getDataList())
|| isEmpty(getIdentifier())) {
isValid = false;
} else {
isValid = true;
}
return isValid;
}

public boolean isEmpty(String paramString){
if((paramString!=null) && (paramString.length()>0)){
for(int i=0;i<paramString.length();i++){
if(paramString.charAt(i)!=' '){
return false;
}
}
}
return true;
}

@Override
public String toString() {

final StringBuffer request = new StringBuffer();
if(mode != null){
request.append("mode: ");
request.append(mode.toString());
}
if(identifier != null){
request.append("identifier: ");
request.append(identifier);
}
if(dataList != null && !dataList.isEmpty()){
request.append("dataList: ");
request.append(dataList.toString());
}
return super.toString() + request;
}
}

/**
*
* Load the data based on the based on the object to table name mapping.
* Identifier is the key to identify the corresponding data from cache
* and generate the sql based on update and insert
*
* @author atp1axi
* @version 1.0
*
*/
public interface DataLoadService {

/**
* Responsible for generating the insert or update script based on the
* identifier. The configuration file will be loaded at container
* start up. The generated sql's and parsed configurations will be in
* in-memory cache.
* @throws Exception
*/
boolean update(DataLoadRequest request) throws Exception;
}

7.DataLoadServiceImpl
package net.atpco.dds.offline.filing.common.datamapper.binder;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;

import net.atpco.dds.offline.filing.common.datamapper.parser.ClassConfig;
import net.atpco.dds.offline.filing.common.datamapper.parser.PropertyConfig;

import org.apache.log4j.Logger;
import org.omg.CORBA.portable.ApplicationException;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Scope;
import org.springframework.jdbc.core.namedparam.MapsqlParameterSource;
import org.springframework.jdbc.core.namedparam.sqlParameterSource;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Propagation;
import org.springframework.transaction.annotation.Transactional;

@Service("dataLoadService")
@Scope("prototype")
public class DataLoadServiceImpl implements DataLoadService {

private static Logger LOGGER = Logger.getLogger(DataLoadServiceImpl.class);

@Autowired
@Qualifier("sqlPreparator")
private transient sqlPreparator sqlPreparator;

@Autowired
@Qualifier("dataLoadDAO")
private transient DataLoadDAO dataLoadDAO;

@Autowired
@Qualifier("dataLoadConfig")
private transient DataLoadConfig dataLoadConfig;

@Value("${jdbc.batch.size}")
private transient Integer batchSize;

/**
* Responsible for generating the insert or update script based on the
* identifier. The configuration file will be loaded at container start up.
* The generated sql's and parsed configurations will be in in-memory cache.
*/
@Override
@Transactional(propagation = Propagation.required)
public boolean update(final DataLoadRequest dataLoadRequest)
throws Exception {
if (!dataLoadRequest.isValid()) {
throw new Exception("Inputs are null");
}

final ClassConfig config = dataLoadConfig
.getClassConfig(dataLoadRequest.getIdentifier());

if (config == null) {
throw new Exception(
"The identifier "
+ dataLoadRequest.getIdentifier()
+ " is null. Make sure the file is included in mapping xml.");
}
// Get the generated sql from cache
String sql = dataLoadConfig.getsqlFromCache(dataLoadRequest
.getIdentifier() + "_" + dataLoadRequest.getMode().toString());

// if sql does not exist in cache prepare a new one and put it in cache
if (sql == null) {
sql = sqlPreparator.preparesql(config,dataLoadRequest.getMode());
dataLoadConfig.setsqlIntoCache(dataLoadRequest.getIdentifier()
+ "_" + dataLoadRequest.getMode().toString(),sql);
}
final List<sqlParameterSource> paramSourceList = new ArrayList<sqlParameterSource>();
for (final Object object : dataLoadRequest.getDataList()) {
final MapsqlParameterSource parameterSource = sqlPreparator
.preparesqlParameter(dataLoadRequest.getMode(),config,object);
paramSourceList.add(parameterSource);
}
// Persist the data based on the batch size.
final List<sqlParameterSource[]> batchList = getBatches(paramSourceList);
int processingCount = 0;
for (final sqlParameterSource[] sources : batchList) {
LOGGER.info("Processing from "+processingCount+
" th record to the maximum of "+sources.length+ " records");
dataLoadDAO.batchUpdate(sql,sources);
processingCount = processingCount + sources.length;
}
return true;
}

/**
* Split the single collection into multiple collections based on the batch
* size.
*
* @param collection
* @return
*/
private List<sqlParameterSource[]> getBatches(
final List<sqlParameterSource> collection) {
int batchCount = 0;
final List<sqlParameterSource[]> batches = new ArrayList<sqlParameterSource[]>();
while (batchCount < collection.size()) {
final int nextInc = Math.min(collection.size() - batchCount,
batchSize);
final List<sqlParameterSource> batch = collection.subList(
batchCount,batchCount + nextInc);
batches.add(batch.toArray(new sqlParameterSource[batch.size()]));
batchCount = batchCount + nextInc;
}
return batches;
}

}

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