267 lines
12 KiB
Plaintext
267 lines
12 KiB
Plaintext
[[java-rest-high-document-update]]
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=== Update API
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[[java-rest-high-document-update-request]]
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==== Update Request
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An `UpdateRequest` requires the following arguments:
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["source","java",subs="attributes,callouts,macros"]
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--------------------------------------------------
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include-tagged::{doc-tests}/CRUDDocumentationIT.java[update-request]
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--------------------------------------------------
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<1> Index
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<2> Type
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<3> Document id
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The Update API allows to update an existing document by using a script
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or by passing a partial document.
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==== Updates with a script
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The script can be provided as an inline script:
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["source","java",subs="attributes,callouts,macros"]
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--------------------------------------------------
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include-tagged::{doc-tests}/CRUDDocumentationIT.java[update-request-with-inline-script]
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--------------------------------------------------
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<1> Script parameters provided as a `Map` of objects
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<2> Create an inline script using the `painless` language and the previous parameters
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<3> Sets the script to the update request
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Or as a stored script:
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["source","java",subs="attributes,callouts,macros"]
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--------------------------------------------------
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include-tagged::{doc-tests}/CRUDDocumentationIT.java[update-request-with-stored-script]
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--------------------------------------------------
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<1> Reference to a script stored under the name `increment-field` in the `painless` language
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<2> Sets the script in the update request
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==== Updates with a partial document
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When using updates with a partial document, the partial document will be merged with the
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existing document.
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The partial document can be provided in different ways:
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["source","java",subs="attributes,callouts,macros"]
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--------------------------------------------------
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include-tagged::{doc-tests}/CRUDDocumentationIT.java[update-request-with-doc-as-string]
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--------------------------------------------------
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<1> Partial document source provided as a `String` in JSON format
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["source","java",subs="attributes,callouts,macros"]
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--------------------------------------------------
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include-tagged::{doc-tests}/CRUDDocumentationIT.java[update-request-with-doc-as-map]
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--------------------------------------------------
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<1> Partial document source provided as a `Map` which gets automatically converted
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to JSON format
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["source","java",subs="attributes,callouts,macros"]
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--------------------------------------------------
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include-tagged::{doc-tests}/CRUDDocumentationIT.java[update-request-with-doc-as-xcontent]
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--------------------------------------------------
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<1> Partial document source provided as an `XContentBuilder` object, the Elasticsearch
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built-in helpers to generate JSON content
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["source","java",subs="attributes,callouts,macros"]
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--------------------------------------------------
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include-tagged::{doc-tests}/CRUDDocumentationIT.java[update-request-shortcut]
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--------------------------------------------------
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<1> Partial document source provided as `Object` key-pairs, which gets converted to
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JSON format
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==== Upserts
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If the document does not already exist, it is possible to define some content that
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will be inserted as a new document using the `upsert` method:
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["source","java",subs="attributes,callouts,macros"]
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--------------------------------------------------
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include-tagged::{doc-tests}/CRUDDocumentationIT.java[update-request-upsert]
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--------------------------------------------------
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<1> Upsert document source provided as a `String`
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Similarly to the partial document updates, the content of the `upsert` document
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can be defined using methods that accept `String`, `Map`, `XContentBuilder` or
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`Object` key-pairs.
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==== Optional arguments
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The following arguments can optionally be provided:
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["source","java",subs="attributes,callouts,macros"]
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--------------------------------------------------
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include-tagged::{doc-tests}/CRUDDocumentationIT.java[update-request-routing]
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--------------------------------------------------
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<1> Routing value
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["source","java",subs="attributes,callouts,macros"]
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--------------------------------------------------
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include-tagged::{doc-tests}/CRUDDocumentationIT.java[update-request-timeout]
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--------------------------------------------------
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<1> Timeout to wait for primary shard to become available as a `TimeValue`
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<2> Timeout to wait for primary shard to become available as a `String`
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["source","java",subs="attributes,callouts,macros"]
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--------------------------------------------------
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include-tagged::{doc-tests}/CRUDDocumentationIT.java[update-request-refresh]
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--------------------------------------------------
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<1> Refresh policy as a `WriteRequest.RefreshPolicy` instance
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<2> Refresh policy as a `String`
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["source","java",subs="attributes,callouts,macros"]
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--------------------------------------------------
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include-tagged::{doc-tests}/CRUDDocumentationIT.java[update-request-retry]
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--------------------------------------------------
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<1> How many times to retry the update operation if the document to update has
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been changed by another operation between the get and indexing phases of the
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update operation
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["source","java",subs="attributes,callouts,macros"]
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--------------------------------------------------
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include-tagged::{doc-tests}/CRUDDocumentationIT.java[update-request-no-source]
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--------------------------------------------------
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<1> Enable source retrieval, disabled by default
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["source","java",subs="attributes,callouts,macros"]
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--------------------------------------------------
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include-tagged::{doc-tests}/CRUDDocumentationIT.java[update-request-source-include]
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--------------------------------------------------
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<1> Configure source inclusion for specific fields
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["source","java",subs="attributes,callouts,macros"]
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--------------------------------------------------
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include-tagged::{doc-tests}/CRUDDocumentationIT.java[update-request-source-exclude]
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--------------------------------------------------
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<1> Configure source exclusion for specific fields
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["source","java",subs="attributes,callouts,macros"]
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--------------------------------------------------
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include-tagged::{doc-tests}/CRUDDocumentationIT.java[update-request-version]
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--------------------------------------------------
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<1> Version
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["source","java",subs="attributes,callouts,macros"]
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--------------------------------------------------
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include-tagged::{doc-tests}/CRUDDocumentationIT.java[update-request-detect-noop]
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--------------------------------------------------
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<1> Disable the noop detection
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["source","java",subs="attributes,callouts,macros"]
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--------------------------------------------------
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include-tagged::{doc-tests}/CRUDDocumentationIT.java[update-request-scripted-upsert]
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--------------------------------------------------
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<1> Indicate that the script must run regardless of whether the document exists or not,
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ie the script takes care of creating the document if it does not already exist.
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["source","java",subs="attributes,callouts,macros"]
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--------------------------------------------------
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include-tagged::{doc-tests}/CRUDDocumentationIT.java[update-request-doc-upsert]
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--------------------------------------------------
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<1> Indicate that the partial document must be used as the upsert document if it
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does not exist yet.
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["source","java",subs="attributes,callouts,macros"]
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--------------------------------------------------
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include-tagged::{doc-tests}/CRUDDocumentationIT.java[update-request-active-shards]
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--------------------------------------------------
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<1> Sets the number of shard copies that must be active before proceeding with
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the update operation.
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<2> Number of shard copies provided as a `ActiveShardCount`: can be `ActiveShardCount.ALL`,
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`ActiveShardCount.ONE` or `ActiveShardCount.DEFAULT` (default)
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[[java-rest-high-document-update-sync]]
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==== Synchronous Execution
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["source","java",subs="attributes,callouts,macros"]
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--------------------------------------------------
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include-tagged::{doc-tests}/CRUDDocumentationIT.java[update-execute]
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--------------------------------------------------
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[[java-rest-high-document-update-async]]
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==== Asynchronous Execution
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The asynchronous execution of an update request requires both the `UpdateRequest`
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instance and an `ActionListener` instance to be passed to the asynchronous
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method:
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["source","java",subs="attributes,callouts,macros"]
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--------------------------------------------------
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include-tagged::{doc-tests}/CRUDDocumentationIT.java[update-execute-async]
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--------------------------------------------------
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<1> The `UpdateRequest` to execute and the `ActionListener` to use when
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the execution completes
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The asynchronous method does not block and returns immediately. Once it is
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completed the `ActionListener` is called back using the `onResponse` method
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if the execution successfully completed or using the `onFailure` method if
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it failed.
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A typical listener for `UpdateResponse` looks like:
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["source","java",subs="attributes,callouts,macros"]
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--------------------------------------------------
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include-tagged::{doc-tests}/CRUDDocumentationIT.java[update-execute-listener]
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--------------------------------------------------
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<1> Called when the execution is successfully completed. The response is
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provided as an argument.
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<2> Called in case of failure. The raised exception is provided as an argument.
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[[java-rest-high-document-update-response]]
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==== Update Response
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The returned `UpdateResponse` allows to retrieve information about the executed
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operation as follows:
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["source","java",subs="attributes,callouts,macros"]
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--------------------------------------------------
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include-tagged::{doc-tests}/CRUDDocumentationIT.java[update-response]
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--------------------------------------------------
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<1> Handle the case where the document was created for the first time (upsert)
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<2> Handle the case where the document was updated
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<3> Handle the case where the document was deleted
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<4> Handle the case where the document was not impacted by the update,
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ie no operation (noop) was executed on the document
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When the source retrieval is enabled in the `UpdateRequest`
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through the fetchSource method, the response contains the
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source of the updated document:
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["source","java",subs="attributes,callouts,macros"]
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--------------------------------------------------
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include-tagged::{doc-tests}/CRUDDocumentationIT.java[update-getresult]
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--------------------------------------------------
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<1> Retrieve the updated document as a `GetResult`
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<2> Retrieve the source of the updated document as a `String`
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<3> Retrieve the source of the updated document as a `Map<String, Object>`
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<4> Retrieve the source of the updated document as a `byte[]`
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<5> Handle the scenario where the source of the document is not present in
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the response (this is the case by default)
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It is also possible to check for shard failures:
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["source","java",subs="attributes,callouts,macros"]
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--------------------------------------------------
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include-tagged::{doc-tests}/CRUDDocumentationIT.java[update-failure]
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--------------------------------------------------
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<1> Handle the situation where number of successful shards is less than
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total shards
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<2> Handle the potential failures
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When a `UpdateRequest` is performed against a document that does not exist,
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the response has `404` status code, an `ElasticsearchException` gets thrown
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which needs to be handled as follows:
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["source","java",subs="attributes,callouts,macros"]
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--------------------------------------------------
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include-tagged::{doc-tests}/CRUDDocumentationIT.java[update-docnotfound]
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--------------------------------------------------
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<1> Handle the exception thrown because the document not exist
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If there is a version conflict, an `ElasticsearchException` will
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be thrown:
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["source","java",subs="attributes,callouts,macros"]
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--------------------------------------------------
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include-tagged::{doc-tests}/CRUDDocumentationIT.java[update-conflict]
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--------------------------------------------------
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<1> The raised exception indicates that a version conflict error was returned.
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