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。

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