{"id":2902,"date":"2017-03-07T08:42:52","date_gmt":"2017-03-07T16:42:52","guid":{"rendered":"https:\/\/www.couchbase.com\/blog\/?p=2902"},"modified":"2025-06-13T20:09:45","modified_gmt":"2025-06-14T03:09:45","slug":"determining-status-replication-couchbase-lite","status":"publish","type":"post","link":"https:\/\/www.couchbase.com\/blog\/es\/determining-status-replication-couchbase-lite\/","title":{"rendered":"Determinar el estado de una replicaci\u00f3n en Couchbase Lite"},"content":{"rendered":"<div id=\"attachment_2919\" style=\"width: 650px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-2919\" class=\"size-full wp-image-2919\" src=\"https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/2017\/03\/19300545790_82ac2a3444_z.jpg\" alt=\"\" width=\"640\" height=\"427\" srcset=\"https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2017\/03\/19300545790_82ac2a3444_z.jpg 640w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2017\/03\/19300545790_82ac2a3444_z-300x200.jpg 300w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2017\/03\/19300545790_82ac2a3444_z-400x267.jpg 400w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2017\/03\/19300545790_82ac2a3444_z-450x300.jpg 450w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2017\/03\/19300545790_82ac2a3444_z-20x13.jpg 20w\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" \/><p id=\"caption-attachment-2919\" class=\"wp-caption-text\">Cortes\u00eda de Andr\u00e9s Nieto Porras (https:\/\/www.flickr.com\/photos\/anieto2k)<\/p><\/div>\n<p><a href=\"https:\/\/developer.couchbase.com\/documentation\/mobile\/current\/guides\/couchbase-lite\/index.html?utm_source=blogs&amp;utm_medium=link&amp;utm_campaign=blogs\">Couchbase Lite<\/a> ejecuta r\u00e9plicas (sincronizaciones) utilizando subprocesos en segundo plano. El inicio y la detenci\u00f3n de las r\u00e9plicas no se producen de forma sincr\u00f3nica. Esto puede dar lugar a errores en la detecci\u00f3n del estado de una replicaci\u00f3n.<\/p>\n<p>En <a href=\"https:\/\/developer.couchbase.com\/documentation\/mobile\/current\/references\/couchbase-lite\/couchbase-lite\/replication\/index.html\">Clase de replicaci\u00f3n<\/a> tiene, seg\u00fan la plataforma, un <code>corriendo<\/code> o una rutina como <code>isRunning()<\/code>. Se trata de una forma ligera de comprobar el estado de una replicaci\u00f3n.<\/p>\n<p>Sin embargo, su uso puede dar lugar a resultados inesperados. Por ejemplo, hace poco escrib\u00ed una utilidad que utiliza r\u00e9plicas continuas. Tengo un bot\u00f3n para iniciarlas y detenerlas. Es tentador usar <code>isRunning<\/code> para actualizar el estado del bot\u00f3n. Resulta que esto es una mala idea. No es sorprendente, dado que los cambios se producen en segundo plano, pero es f\u00e1cil pasarlo por alto.<\/p>\n<p>En su lugar, el enfoque preferido utiliza un escuchador de cambios. He aqu\u00ed un ejemplo.<\/p>\n<p>Tenemos dos clases. La clase de ayuda de base de datos envuelve algunas operaciones est\u00e1ndar para simplificar. He a\u00f1adido una interfaz para emplear un patr\u00f3n de devoluci\u00f3n de llamada. La clase cliente tiene que implementarlo. La clase helper digiere la notificaci\u00f3n de cambio de Couchbase Lite antes de pasar nada al cliente. Esto da una buena separaci\u00f3n de preocupaciones.<\/p>\n<p>Las listas de c\u00f3digos que figuran a continuaci\u00f3n son esquemas. S\u00f3lo muestran lo esencial. Veamos primero la clase helper.<\/p>\n<pre class=\"lang:java decode:true\">public class DBHelper implements Replication.ChangeListener {\r\n  private boolean replicationActive = false;\r\n  private List stateListeners = new ArrayList&amp;lt;&amp;gt;();\r\n  ...\r\n\r\n  public interface ReplicationStateListener {\r\n    void onChange(boolean isActive);\r\n  }\r\n\r\n  public void startReplication(URL gateway, boolean continuous) {\r\n    ...\r\n\r\n    pushReplication.addChangeListener(this);\r\n    pushReplication.start();\r\n  }\r\n\r\n  public void stopReplication() {\r\n    ...\r\n  }\r\n\r\n  public void addReplicationStateListener(ReplicationStateListener listener) {\r\n    stateListeners.add(listener);\r\n  }\r\n\r\n  public void removeReplicationStateListener(ReplicationStateListener listener) {\r\n    stateListeners.remove(listener);\r\n  }\r\n\r\n  \/\/ Replication.ChangeListener\r\n  @Override\r\n  public void changed(Replication.ChangeEvent changeEvent) {\r\n    if (changeEvent.getError() != null) {\r\n      Throwable lastError = changeEvent.getError();\r\n\r\n      \/\/ React to the error\r\n\r\n      return;\r\n    }\r\n\r\n    if (changeEvent.getTransition() == null) return;\r\n\r\n    ReplicationState dest = changeEvent.getTransition().getDestination();\r\n\r\n    replicationActive = ((dest == ReplicationState.STOPPING || dest == ReplicationState.STOPPED) ? false : true);\r\n\r\n    stateListeners.forEach(listener -&gt; listener.onChange(replicationActive));\r\n  }\r\n}<\/pre>\n<p>Vemos que DBHelper implementa el m\u00e9todo <code>Replication.ChangeListener<\/code> interfaz. Se trata de una interfaz definida por Couchbase Lite. En <code>startReplication<\/code> a\u00f1adimos este listener a la replicaci\u00f3n. Tiene un m\u00e9todo para anular, <code>cambiado<\/code>. En <code>Evento de cambio<\/code> puede tener varios valores diferentes. En el ejemplo, primero compruebo si hay errores y notifico al usuario si se produce alguno. De lo contrario, compruebo si se trata de un evento de transici\u00f3n de estado de replicaci\u00f3n. El estado de destino puede ser uno de los siguientes <code>INICIAL<\/code>, <code>RUNNING<\/code>, <code>IDLE<\/code>, <code>FUERA DE L\u00cdNEA<\/code>, <code>PARADA<\/code>o <code>PARADA<\/code>.<\/p>\n<p>En este caso s\u00f3lo quiero saber si la replicaci\u00f3n se est\u00e1 cerrando, as\u00ed que simplifico el valor de retorno. Permito a los clientes registrar m\u00e1s de un oyente, as\u00ed que el \u00faltimo trozo de c\u00f3digo hace un bucle sobre todas las retrollamadas y las invoca.<\/p>\n<p>La clase cliente es a\u00fan m\u00e1s sencilla. Hago que la clase implemente la interfaz necesaria de la clase helper. S\u00f3lo tiene que registrar el oyente durante la construcci\u00f3n de la instancia, y tener <code>onChange<\/code> haz lo que necesites en la interfaz de usuario.<\/p>\n<pre><code class=\"language-java\">public class Client implements DBHelper.ReplicationStateListener {\r\n  private DBHelper service = DBHelper.getInstance();\r\n  ...\r\n\r\n  public Client() {\r\n    service.addReplicationStateListener(this);\r\n  }\r\n\r\n  ...\r\n\r\n  \/\/ DBHelper.ReplicationStateListener\r\n  @Override\r\n  public void onChange(boolean isActive) {\r\n    \/\/ Code to handle the change\r\n  }\r\n}<\/code><\/pre>\n<p>Este c\u00f3digo procede de una herramienta que he creado. Lea sobre la herramienta en <a href=\"https:\/\/www.couchbase.com\/blog\/es\/couchbase-mobile-changes-explorer-part-1\/\">esta entrada<\/a>Puede encontrar el c\u00f3digo fuente en GitHub <a href=\"https:\/\/github.com\/couchbaselabs\/CBM-Changes-Explorer\">aqu\u00ed<\/a>.<\/p>\n<h2>Posdata<\/h2>\n<p>Consulte m\u00e1s recursos en nuestra <a href=\"https:\/\/www.couchbase.com\/blog\/es\/developers\/community\/?utm_source=blogs&amp;utm_medium=link&amp;utm_campaign=blogs\">portal para desarrolladores<\/a> y s\u00edganos en Twitter <a href=\"https:\/\/twitter.com\/CouchbaseDev\">@CouchbaseDev<\/a>.<\/p>\n<p>Puede enviar preguntas a nuestro <a href=\"https:\/\/www.couchbase.com\/blog\/es\/forums\/?utm_source=blogs&amp;utm_medium=link&amp;utm_campaign=blogs\">foros<\/a>. Y participamos activamente en <a href=\"https:\/\/stackoverflow.com\/questions\/tagged\/couchbase\">Stack Overflow<\/a>.<\/p>\n<p>Cont\u00e1ctame en Twitter <a href=\"https:\/\/twitter.com\/HodGreeley\">@HodGreeley<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>Couchbase Lite runs replications (syncs) using background threads. Starting and stopping replications doesn&#8217;t happen synchronously. This can lead to mistakes in detecting the state of a replication. The Replication class has, depending on platform, either a running property or a [&hellip;]<\/p>","protected":false},"author":73,"featured_media":2919,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[1815,7667,1810],"tags":[1562],"ppma_author":[9042],"class_list":["post-2902","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-best-practices-and-tutorials","category-couchbase-lite","category-couchbase-mobile","tag-replication"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.1 (Yoast SEO v26.1.1) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Determining Status of a Replication in Couchbase Lite - The Couchbase Blog<\/title>\n<meta name=\"description\" content=\"This blog focuses on how to use Replication class and change listener for checking the status of replication in Couchbase Lite.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.couchbase.com\/blog\/es\/determining-status-replication-couchbase-lite\/\" \/>\n<meta property=\"og:locale\" content=\"es_MX\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Determining Status of a Replication in Couchbase Lite\" \/>\n<meta property=\"og:description\" content=\"This blog focuses on how to use Replication class and change listener for checking the status of replication in Couchbase Lite.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.couchbase.com\/blog\/es\/determining-status-replication-couchbase-lite\/\" \/>\n<meta property=\"og:site_name\" content=\"The Couchbase Blog\" \/>\n<meta property=\"article:published_time\" content=\"2017-03-07T16:42:52+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-06-14T03:09:45+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2017\/03\/19300545790_82ac2a3444_z.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"640\" \/>\n\t<meta property=\"og:image:height\" content=\"427\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Hod Greeley, Developer Advocate, Couchbase\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@HodGreeley\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Hod Greeley, Developer Advocate, Couchbase\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 minutos\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.couchbase.com\/blog\/determining-status-replication-couchbase-lite\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.couchbase.com\/blog\/determining-status-replication-couchbase-lite\/\"},\"author\":{\"name\":\"Hod Greeley, Developer Advocate, Couchbase\",\"@id\":\"https:\/\/www.couchbase.com\/blog\/#\/schema\/person\/9b62593c8a13531e53d52fcd5aabbca4\"},\"headline\":\"Determining Status of a Replication in Couchbase Lite\",\"datePublished\":\"2017-03-07T16:42:52+00:00\",\"dateModified\":\"2025-06-14T03:09:45+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.couchbase.com\/blog\/determining-status-replication-couchbase-lite\/\"},\"wordCount\":434,\"commentCount\":2,\"publisher\":{\"@id\":\"https:\/\/www.couchbase.com\/blog\/#organization\"},\"image\":{\"@id\":\"https:\/\/www.couchbase.com\/blog\/determining-status-replication-couchbase-lite\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2017\/03\/19300545790_82ac2a3444_z.jpg\",\"keywords\":[\"replication\"],\"articleSection\":[\"Best Practices and Tutorials\",\"Couchbase Lite\",\"Couchbase Mobile\"],\"inLanguage\":\"es\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/www.couchbase.com\/blog\/determining-status-replication-couchbase-lite\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.couchbase.com\/blog\/determining-status-replication-couchbase-lite\/\",\"url\":\"https:\/\/www.couchbase.com\/blog\/determining-status-replication-couchbase-lite\/\",\"name\":\"Determining Status of a Replication in Couchbase Lite - 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