Adding and Editing Data

DittoWriteTransaction exposes functionality that allows you to perform multiple operations on the store within a single write transaction. You must use the scoped function to get collection-scoped access to the write transaction object, which will then allow you to perform insert, update, remove or evict operations using the write transaction.

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public class DittoWriteTransaction

Defines the various strategies available when inserting a document into a collection.

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public enum DittoWriteStrategy

DittoScopedWriteTransaction exposes functionality that allows you to perform multiple operations on the store within a single write transaction.

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public class DittoScopedWriteTransaction

These objects are returned when using find and findAll functionality on DittoScopedWriteTransactions. You can use them to perform updates on documents and remove or evict documents.

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public class DittoWriteTransactionPendingCursorOperation

These objects are returned when using findByID functionality on DittoScopedWriteTransactions. You can use them to perform updates on a document and remove or evict a document.

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public class DittoWriteTransactionPendingIDSpecificOperation

These objects are returned when calling collections() on DittoStore.

They allow chaining of further collections-related functions. You can either call exec on the object to get an array of DittoCollections as an immediate return value, or you can establish either a live query or a subscription, which both work over time.

A live query, established by calling observe, will notify you every time there’s a change in the collections that the device knows about.

A subscription, established by calling subscribe, will act as a signal to other peers that the device connects to that you would like to receive updates from them about the collections that they know about.

Calling observe will generate both a subscription and a live query at the same time.

If you’d like to only observe local changes then you can call observeLocal.

If you want to observe changes in such a way that you can signal when you’re ready for the live query to deliver a new update then you can call observeWithNextSignal or observeLocalWithNextSignal.

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public class DittoPendingCollectionsOperation

Describes the result of an update operation performed on a DittoMutableDocument.

• set: Describes the set update that was performed.
• removed: Describes the remove update that was performed.
• incremented: Describes the increment update that was performed.
• pushed: Describes the push update that was performed.
• popped: Describes the pop update that was performed.
• inserted: Describes the insert update that was performed.

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public enum DittoUpdateResult

Describes one part of the result of a write transaction.

• inserted: Describes a document that has been inserted, referencing its ID and the collection it was inserted into.
• updated: Describes a document that has been updated, referencing its ID and the collection it belongs to.
• evicted: Describes a document that has been evicted, referencing its ID and the collection it belonged to.
• removed: Describes a document that has been removed, referencing its ID and the collection it belonged to.

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public enum DittoWriteTransactionResult