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DataxReader.java
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DataxReader.java
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/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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
* <p>
* http:https://www.apache.org/licenses/LICENSE-2.0
* <p>
* 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 com.qlangtech.tis.datax.impl;
import com.alibaba.datax.plugin.writer.hdfswriter.HdfsColMeta;
import com.google.common.cache.CacheBuilder;
import com.google.common.cache.CacheLoader;
import com.google.common.cache.LoadingCache;
import com.google.common.collect.Lists;
import com.qlangtech.tis.TIS;
import com.qlangtech.tis.annotation.Public;
import com.qlangtech.tis.datax.IDataxReader;
import com.qlangtech.tis.extension.Describable;
import com.qlangtech.tis.extension.Descriptor;
import com.qlangtech.tis.extension.IPropertyType;
import com.qlangtech.tis.extension.PluginFormProperties;
import com.qlangtech.tis.extension.impl.BaseSubFormProperties;
import com.qlangtech.tis.extension.impl.IncrSourceExtendSelected;
import com.qlangtech.tis.extension.impl.SuFormProperties;
import com.qlangtech.tis.offline.DataxUtils;
import com.qlangtech.tis.plugin.IDataXEndTypeGetter;
import com.qlangtech.tis.plugin.IPluginStore;
import com.qlangtech.tis.plugin.KeyedPluginStore;
import com.qlangtech.tis.plugin.PluginStore;
import com.qlangtech.tis.plugin.StoreResourceType;
import com.qlangtech.tis.plugin.datax.SelectedTab;
import com.qlangtech.tis.plugin.datax.SelectedTabExtend;
import com.qlangtech.tis.plugin.ds.ColumnMetaData;
import com.qlangtech.tis.plugin.ds.IColMetaGetter;
import com.qlangtech.tis.plugin.ds.TableNotFoundException;
import com.qlangtech.tis.plugin.incr.ISelectedTabExtendFactory;
import com.qlangtech.tis.sql.parser.tuple.creator.EntityName;
import com.qlangtech.tis.util.HeteroEnum;
import com.qlangtech.tis.util.IPluginContext;
import com.qlangtech.tis.util.UploadPluginMeta;
import org.apache.commons.collections.CollectionUtils;
import org.apache.commons.lang.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import java.util.Objects;
import java.util.Optional;
import java.util.Set;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;
/**
* datax Reader
*
* @author 百岁([email protected])
* @date 2021-04-07 14:48
*/
@Public
public abstract class DataxReader implements Describable<DataxReader>, IDataxReader, IPluginStore.RecyclableController {
private static final Logger logger = LoggerFactory.getLogger(DataxReader.class);
public static final String HEAD_KEY_REFERER = "Referer";
public static final ThreadLocal<DataxReader> dataxReaderThreadLocal = new ThreadLocal<>();
public static DataxReader getThreadBingDataXReader() {
DataxReader reader = dataxReaderThreadLocal.get();
return reader;
}
public static <T extends DataxReader> T getDataxReader(IPropertyType.SubFormFilter filter) {
return getDataxReader(filter.uploadPluginMeta);
}
public static <T extends DataxReader> T getDataxReader(UploadPluginMeta uploadPluginMeta) {
IPluginStore<?> pluginStore = HeteroEnum.getDataXReaderAndWriterStore(uploadPluginMeta.getPluginContext(),
true, uploadPluginMeta);
DataxReader reader = (DataxReader) pluginStore.getPlugin();
if (reader == null) {
throw new IllegalStateException("dataXReader can not be null:" + uploadPluginMeta.toString());
}
return (T) reader;
}
public static Optional<Descriptor<SelectedTabExtend>> getBatchSourceSelectedTabExtendDescriptor(UploadPluginMeta uploadPluginMeta) {
DataxReader dataxReader = getDataxReader(uploadPluginMeta);
Descriptor<DataxReader> descriptor = dataxReader.getDescriptor();
if (!(descriptor instanceof ISelectedTabExtendFactory)) {
// throw new IllegalStateException("descriptor:" + descriptor.getClass().getName() +
// " must be instance of "
// + IIncrSourceSelectedTabExtendFactory.class.getName());
return Optional.empty();
}
// Field subFormField, Class instClazz, Descriptor subFormFieldsDescriptor
Descriptor<SelectedTabExtend> selectedTableExtendDesc =
((ISelectedTabExtendFactory) descriptor).getSelectedTableExtendDescriptor();
return Optional.ofNullable(selectedTableExtendDesc);
}
private transient LoadingCache<String, IStreamTableMeta> tabMetaCache;
@Override
public final IStreamTableMeta getStreamTableMeta(String tableName) {
if (this.tabMetaCache == null) {
tabMetaCache = CacheBuilder.newBuilder().expireAfterWrite(40, TimeUnit.SECONDS).build(new CacheLoader<String, IStreamTableMeta>() {
@Override
public IStreamTableMeta load(String tableName) throws Exception {
try {
List<ColumnMetaData> cols = getTableMetadata(false, EntityName.parse(tableName));
final List<IColMetaGetter> colsMeta = cols.stream().map((c) -> new HdfsColMeta(c.getName(), c.isNullable(), c.isPk(),
c.getType())).collect(Collectors.toList());
return new IStreamTableMeta() {
@Override
public List<IColMetaGetter> getColsMeta() {
return colsMeta;
}
};
} catch (TableNotFoundException e) {
throw new RuntimeException(e);
}
}
});
}
try {
return tabMetaCache.get(tableName);
} catch (ExecutionException e) {
throw new RuntimeException("tableName:" + tableName, e);
}
}
@Override
public void refresh() {
}
public static KeyedPluginStore<DataxReader> getPluginStore(IPluginContext pluginContext, String appname) {
return getPluginStore(pluginContext, false, appname);
}
/**
* @param pluginContext
* @param db 是否是db相关配置
* @param appname
* @return
*/
public static KeyedPluginStore<DataxReader> getPluginStore(IPluginContext pluginContext, boolean db,
String appname) {
return TIS.dataXReaderPluginStore.get(createDataXReaderKey(pluginContext, db, appname));
}
public static void cleanPluginStoreCache(IPluginContext pluginContext, boolean db, String appname) {
TIS.DataXReaderAppKey appKey = createDataXReaderKey(pluginContext, db, appname);
TIS.dataXReaderPluginStore.clear(appKey);
if (pluginContext != null) {
// 保证在DataXAction+doUpdateDatax 方法中两次调用以下方法块只被调用一次
return;
}
// 需要将非编辑模式下的对象也跟新一下=====================================
Set<Map.Entry<SubFieldFormAppKey<? extends Describable>, KeyedPluginStore<? extends Describable>>> entries =
TIS.dataXReaderSubFormPluginStore.getEntries();
List<SubFieldFormAppKey<? extends Describable>> willDelete = Lists.newArrayList();
entries.forEach((e) -> {
SubFieldFormAppKey key = e.getKey();
if (StringUtils.equals(key.keyVal.getVal(), appname) && key.isDB() == db) {
willDelete.add(key);
}
});
willDelete.forEach((deleteKey) -> {
TIS.dataXReaderSubFormPluginStore.clear(deleteKey);
});
}
private static TIS.DataXReaderAppKey createDataXReaderKey(IPluginContext pluginContext, boolean db,
String appname) {
final TIS.DataXReaderAppKey key = new TIS.DataXReaderAppKey(pluginContext, db, appname,
new PluginStore.IPluginProcessCallback<DataxReader>() {
@Override
public void afterDeserialize(PluginStore<DataxReader> ps,final DataxReader reader) {
List<PluginFormProperties> subFieldFormPropertyTypes =
reader.getDescriptor().getSubPluginFormPropertyTypes();
if (subFieldFormPropertyTypes.size() > 0) {
// 加载子字段
subFieldFormPropertyTypes.forEach((pt) -> {
pt.accept(new PluginFormProperties.IVisitor() {
@Override
public Void visit(final BaseSubFormProperties props) {
SubFieldFormAppKey<? extends Describable> subFieldKey =
new SubFieldFormAppKey<>(pluginContext, db, appname, props, DataxReader.class);
KeyedPluginStore<? extends Describable> subFieldStore =
KeyedPluginStore.getPluginStore(subFieldKey);
UploadPluginMeta extMeta = UploadPluginMeta.parse(pluginContext,
"name:" + DataxUtils.DATAX_NAME + "_" + appname, true);
Map<String, SelectedTab> tabsExtend = SelectedTabExtend.getTabExtend(extMeta
// , new PluginStore.PluginsUpdateListener(DataxUtils.DATAX_NAME + "_" + appname,
// reader) {
// @Override
// public void accept(PluginStore<Describable> store) {
// // logger.info("execute setReaderSubFormProp1,subitem count:" + subFieldStore.getPlugins().size() + ",extendCount:" + SelectedTabExtend.getTabExtend(extMeta).size());
// setReaderSubFormProp(props, subFieldStore.getPlugins(),
// SelectedTabExtend.getTabExtend(extMeta));
// }
// }
);
// 子表单中的内容更新了之后,要同步父表单中的状态
subFieldStore.addPluginsUpdateListener(new PluginStore.PluginsUpdateListener(subFieldKey.getSerializeFileName(), reader) {
@Override
public void accept(PluginStore<Describable> pluginStore) {
// logger.info("execute setReaderSubFormProp2,subitem count:" + pluginStore.getPlugins().size() + ",extendCount:" + tabsExtend.size());
setReaderSubFormProp(props, pluginStore.getPlugins(), Collections.emptyMap() /**千万要为emptyMap(),不然在和上面getTabExtend中的listener的回调重复了,且会覆盖脏数据*/);
}
});
List<? extends Describable> subItems = subFieldStore.getPlugins();
if (CollectionUtils.isEmpty(subItems)) {
return null;
}
setReaderSubFormProp(props, subItems, tabsExtend);
return null;
}
private void setReaderSubFormProp(BaseSubFormProperties props,
List<? extends Describable> subItems //
, Map<String, SelectedTab> subItemsExtend) {
setReaderSubFormProp(props, reader, subItems, subItemsExtend);
}
private void setReaderSubFormProp(BaseSubFormProperties props, DataxReader reader, List<?
extends Describable> subItems, Map<String, SelectedTab> subItemsExtend) {
if (reader == null) {
return;
}
subItems.forEach((item) -> {
if (!props.instClazz.isAssignableFrom(item.getClass())) {
throw new IllegalStateException("appname:" + appname + ",item class[" + item.getClass().getSimpleName() + "] is not type of " + props.instClazz.getName());
}
if (item instanceof SelectedTab) {
SelectedTab tab = ((SelectedTab) item);
SelectedTab ext = subItemsExtend.get(tab.identityValue());
if (ext != null) {
tab.setIncrSourceProps(ext.getIncrSourceProps());
tab.setIncrSinkProps(ext.getIncrSinkProps());
tab.setSourceProps(ext.getSourceProps());
}
}
});
try {
props.subFormField.set(reader, subItems);
} catch (IllegalAccessException e) {
throw new RuntimeException("get subField:" + props.getSubFormFieldName(), e);
}
}
});
});
}
}
});
return key;
}
public interface IDataxReaderGetter {
DataxReader get(String appName);
}
/**
* 测试用
*/
public static IDataxReaderGetter dataxReaderGetter;
public static DataxReader load(IPluginContext pluginContext, String appName) {
return load(pluginContext, false, appName);
}
/**
* load
*
* @param appName
* @return
*/
public static DataxReader load(IPluginContext pluginContext, boolean isDB, String appName) {
DataxReader reader = null;
if (dataxReaderGetter != null) {
reader = dataxReaderGetter.get(appName);
DataxReader.dataxReaderThreadLocal.set(reader);
return reader;
}
reader = getPluginStore(pluginContext, isDB, appName).getPlugin();
Objects.requireNonNull(reader, "appName:" + appName + " relevant appSource can not be null");
DataxReader.dataxReaderThreadLocal.set(reader);
return reader;
}
public static class SubFieldFormAppKey<TT extends Describable> extends KeyedPluginStore.AppKey<TT> {
public final BaseSubFormProperties subfieldForm;
public SubFieldFormAppKey(IPluginContext pluginContext, boolean isDB, String appname,
BaseSubFormProperties subfieldForm, Class<TT> clazz) {
super(pluginContext, StoreResourceType.parse(isDB), Objects.requireNonNull(appname,
"appname can not be " + "empty"), clazz);
this.subfieldForm = subfieldForm;
}
@Override
public String getSerializeFileName() {
return super.getSerializeFileName() + "." + this.subfieldForm.getSubFormFieldName();
}
}
private transient boolean dirty = false;
@Override
public boolean isDirty() {
return this.dirty;
}
@Override
public void signDirty() {
// 标记可以在PluginStore中被剔出了
this.dirty = true;
}
@Override
public final Descriptor<DataxReader> getDescriptor() {
Descriptor<DataxReader> descriptor = TIS.get().getDescriptor(this.getClass());
Objects.requireNonNull(descriptor, "class:" + this.getClass() + " relevant descriptor can not be null");
Class<BaseDataxReaderDescriptor> expectClass = getExpectDescClass();
if (!(expectClass.isAssignableFrom(descriptor.getClass()))) {
throw new IllegalStateException(descriptor.getClass() + " must implement the Descriptor of " + expectClass.getName());
}
BaseDataxReaderDescriptor readDesc = (BaseDataxReaderDescriptor) descriptor;
if (readDesc.isRDBMSChangeableInLifetime() ^ (this instanceof DataXBasicProcessMeta.IRDBMSSupport)) {
throw new IllegalStateException(this.getClass().getSimpleName() + " bool status shall be same:\n" + " " + "readDesc.isRDBMSChangeableInLifetime(): " + readDesc.isRDBMSChangeableInLifetime() + "\n (" + this.getClass().getSimpleName() + " instanceof DataXBasicProcessMeta.IRDBMSSupport):" + (this instanceof DataXBasicProcessMeta.IRDBMSSupport));
}
return descriptor;
}
protected <TT extends DataxReader.BaseDataxReaderDescriptor> Class<TT> getExpectDescClass() {
return (Class<TT>) BaseDataxReaderDescriptor.class;
}
public static abstract class BaseDataxReaderDescriptor extends Descriptor<DataxReader> implements IDataXEndTypeGetter {
@Override
public PluginFormProperties getPluginFormPropertyTypes(Optional<IPropertyType.SubFormFilter> subFormFilter) {
IPropertyType.SubFormFilter filter = null;
if (subFormFilter.isPresent()) {
filter = subFormFilter.get();
if (filter.isIncrProcessExtend()) {
Descriptor parentDesc = filter.getTargetDescriptor();
SuFormProperties subProps =
(SuFormProperties) parentDesc.getSubPluginFormPropertyTypes(filter.subFieldName);
return new IncrSourceExtendSelected(filter.uploadPluginMeta, subProps.subFormField);
}
}
return super.getPluginFormPropertyTypes(subFormFilter);
}
@Override
public final PluginVender getVender() {
return PluginVender.DATAX;
}
@Override
public final Map<String, Object> getExtractProps() {
Map<String, Object> eprops = super.getExtractProps();
eprops.put("rdbms", this.isRdbms());
eprops.put(KEY_SUPPORT_INCR, this.isSupportIncr());
eprops.put(KEY_SUPPORT_BATCH, this.isSupportBatch());
// this.getEndType().appendProps(eprops);
// eprops.put(KEY_END_TYPE, this.getEndType().getVal());
// eprops.put(KEY_SUPPORT_ICON, this.getEndType().getIcon() != null);
return eprops;
}
/**
* 是否支持DataX 批量执行
*
* @return
*/
@Override
public boolean isSupportBatch() {
return true;
}
/**
* 像Mysql会有明确的表名,而OSS没有明确的表名,RDBMS 关系型数据库 应该都为true
*
* @return
*/
public boolean hasExplicitTable() {
return this.isRdbms();
}
/**
* 是否可以选择多个表,像Mysql这样的 ,RDBMS 关系型数据库 应该都为true
*
* @return
*/
public abstract boolean isRdbms();
/**
* 需要使DataX Reader实现 接口:DataXBasicProcessMeta.IRDBMSSupport
*
* @return
* @see DataXBasicProcessMeta.IRDBMSSupport
*/
public boolean isRDBMSChangeableInLifetime() {
return false;
}
}
}