Posts (page 85)
-
5 min readIn Solr, you can order groups by count using the "group" and "group.sort" parameters. To order groups by count, you need to specify the "group" parameter with the field you want to group by and the "group.sort" parameter with the sorting option "count desc" to sort the groups by count in descending order. This will order the groups based on the number of documents in each group.
-
5 min readIn Elixir, you can create a hash or MD5 checksum from a map using the :crypto module. First, you need to convert the map to a binary representation using the :erlang.term_to_binary/1 function. Then, you can use the :crypto module to calculate the hash or MD5 checksum. Here is an example code snippet to demonstrate this: map = %{key1: "value1", key2: "value2"} binary = :erlang.term_to_binary(map) hash = :crypto.hash(:sha256, binary) md5 = :crypto.hash(:md5, binary) IO.
-
7 min readApache Solr is a powerful and highly scalable search platform built on Apache Lucene. It can be integrated with Java applications to enable full-text search functionality.To use Apache Solr with Java, you first need to add the necessary Solr client libraries to your Java project. These libraries provide Java APIs that allow you to interact with the Solr server.Once the Solr client libraries are included in your project, you can connect to the Solr server using the Solrj client API.
-
5 min readIn Elixir, you can share state between processes by using GenServer, which is a behavior module that allows you to create processes that can store and manipulate state. GenServer processes can communicate with each other through message passing.To share state between processes, you can start a GenServer process that will store the shared state. Other processes can then send messages to the GenServer process to read or update the shared state.
-
6 min readTo install Solr in Tomcat, first download the desired version of Apache Solr from the official website. After downloading the Solr package, extract the files to a desired location on your server. Next, navigate to the "example" directory within the extracted Solr files and locate the "webapps" folder. Copy the "solr.war" file from the "webapps" folder to the "webapps" directory of your Tomcat installation. Restart Tomcat to deploy the Solr application.
-
7 min readIn Elixir, you can retry connecting to an AMQP server by using a combination of supervision trees, processes, and the retry-exponential-backoff library. By creating a supervised process that handles the connection to the AMQP server, you can define a strategy for retrying the connection attempts.One approach is to use the retry-exponential-backoff library to implement an exponential backoff strategy for reconnecting to the AMQP server.
-
6 min readTo join and search all the fields in Solr, you can use the "*" wildcard character to search across all fields in your Solr index. This wildcard character allows you to perform a search that includes all fields within your Solr schema. By using this wildcard character in your search query, you can retrieve results that match the search term across all fields in your Solr index.
-
3 min readTo increment a value in a loop in Elixir, you can use recursion rather than traditional looping constructs like for or while loops. You can pass the updated value as an argument to the recursive function and keep incrementing it until a certain condition is met. This functional programming approach is common in Elixir and aligns with the language's design principles. By using recursion and pattern matching, you can easily achieve the desired increment behavior in a loop in Elixir.
-
6 min readTo stop Solr servers properly, it is recommended to gracefully shutdown the servers by sending a shutdown command using the solr script or API. This allows the server to finish handling any ongoing requests before stopping completely. Alternatively, you can use the kill command to forcefully stop the server, but this may lead to data loss or corruption if not done carefully.
-
5 min readTo replace elements in an array in Elixir, you can use the Kernel.put_elem/3 function. This function takes three arguments: the array, the index of the element to replace, and the new value you want to replace it with.For example, suppose you have an array [1, 2, 3, 4] and you want to replace the element at index 2 with the value 6. You can do this by calling put_elem(array, 2, 6), which will return [1, 2, 6, 4].
-
5 min readMonitoring Solr indexing speed involves keeping track of the time taken for documents to be added to a Solr collection. This can be achieved by using various tools and techniques such as using the Solr admin dashboard to monitor indexing performance metrics, setting up logging and monitoring systems to track indexing operations, and using performance monitoring tools like APM (Application Performance Monitoring) or Elasticsearch's Indexing Benchmarks tool to measure indexing speed.
-
3 min readIn Elixir, you can extract the filename from a URL by first parsing the URL string using the URI module to get the path component of the URL. Then, you can use the Path module to extract just the filename from the path. Here's an example code snippet that demonstrates how to do this: url = "https://example.com/path/to/file.txt" parsed_url = URI.parse(url) path = Path.basename(parsed_url.path) IO.puts(path) # Output: "file.