Mobile Services 提交批量数据

Mobile Services批量提交数据，參考了文章：Inserting
multiple items at once in Azure Mobile Services。里面事实上已经介绍得比較清楚了。但因为是英文。并且有些地方交待得不清楚。也没有Android的演示样例。故下文以Android版本号的开发为例作个补充。

首先在Mobile Services项目里新建AllToDoItems以及ToDoItem表。点击AllToDoItems，再点击script标签。将里面的内容替换例如以下：

function insert(item, user, request) {
var table = tables.getTable('ToDoItem');
populateTable(table, request, item.todos);
}

function populateTable(table, request, films) {
var index = 0;
films.forEach(changeReleaseDate);
var insertNext = function () {
if (index >= films.length) {
request.respond(201, { id: 1, status: 'Table populated successfully' });
} else {
var toInsert = films[index];
table.insert(toInsert, {
success: function () {
index++;
if ((index % 20) === 0) {
console.log('Inserted %d items', index);
}

insertNext();
}
});
}
};

insertNext();
}

function changeReleaseDate(obj) {
var releaseDate = obj.ReleaseDate;
if (typeof releaseDate === 'string') {
releaseDate = new Date(releaseDate);
obj.ReleaseDate = releaseDate;
}
}

服务端的工作到此完毕。

client新建两个类。分别例如以下：

package com.example.ecodriveiot;

/**
* Represents an item in a ToDo list
*/
public class ToDoItem {

/**
* Item text
*/
@com.google.gson.annotations.SerializedName("text")
private String mText;

/**
* Item Id
*/
@com.google.gson.annotations.SerializedName("id")
private String mId;

/**
* Indicates if the item is completed
*/
@com.google.gson.annotations.SerializedName("complete")
private boolean mComplete;

/**
* ToDoItem constructor
*/
public ToDoItem() {

}

@Override
public String toString() {
return getText();
}

/**
* Initializes a new ToDoItem
*
* @param text
*            The item text
* @param id
*            The item id
*/
public ToDoItem(String text, String id) {
this.setText(text);
this.setId(id);
}

/**
* Returns the item text
*/
public String getText() {
return mText;
}

/**
* Sets the item text
*
* @param text
*            text to set
*/
public final void setText(String text) {
mText = text;
}

/**
* Returns the item id
*/
public String getId() {
return mId;
}

/**
* Sets the item id
*
* @param id
*            id to set
*/
public final void setId(String id) {
mId = id;
}

/**
* Indicates if the item is marked as completed
*/
public boolean isComplete() {
return mComplete;
}

/**
* Marks the item as completed or incompleted
*/
public void setComplete(boolean complete) {
mComplete = complete;
}

@Override
public boolean equals(Object o) {
return o instanceof ToDoItem && ((ToDoItem) o).mId == mId;
}
}

package com.example.ecodriveiot;

public class AllToDoItems {
@com.google.gson.annotations.SerializedName("id")
public String id;
public String status;
public ToDoItem[] todos;
}

批量提交的代码例如以下：

ToDoItem item = new ToDoItem();

item.setText("test");
item.setComplete(false);

ToDoItem[] items = new ToDoItem[2];
items[0]=item;
items[1]=item;
// Insert the new item
/*mToDoTable.insert(item, new TableOperationCallback<ToDoItem>() {

public void onCompleted(ToDoItem entity, Exception exception, ServiceFilterResponse response) {

if (exception == null) {
if (!entity.isComplete()) {
mAdapter.add(entity);
}
} else {
createAndShowDialog(exception, "Error");
}

}
});*/
AllToDoItems allToDoItems = new AllToDoItems();
allToDoItems.todos=items;
mClient.getTable(AllToDoItems.class).insert(allToDoItems, new TableOperationCallback<AllToDoItems>() {

public void onCompleted(AllToDoItems entity, Exception exception, ServiceFilterResponse response) {

if (exception == null) {
Log.i("Debug", "status:"+entity.status);
} else {
createAndShowDialog(exception, "Error");
}
}
});

上面的代码事实上是在sdk demo的基础上改的，mClient的初始化自己加上就可以。其它client的开发事实上是类似的，能够查看英文原文。当然，里面的ToDoItem[] todos可以改变的ArrayList<ToDoItem> todos。