60 lines
2.0 KiB
Java
60 lines
2.0 KiB
Java
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/**
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* Determines how long could be a query executed
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* from Java driver.
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*
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* Performs binary search until the maximum possible
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* query size has found.
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*/
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import java.util.*;
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import org.neo4j.driver.v1.*;
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import org.neo4j.driver.v1.types.*;
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import static org.neo4j.driver.v1.Values.parameters;
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public class MaxQueryLength {
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public static void main(String[] args) {
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// init driver
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Config config = Config.build().withoutEncryption().toConfig();
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Driver driver = GraphDatabase.driver("bolt://localhost:7687",
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AuthTokens.basic( "", "" ),
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config);
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// init query
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int property_size = 0;
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int min_len = 1;
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int max_len = 100000;
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String query_template = "CREATE (n {name:\"%s\"})";
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int template_size = query_template.length() - 2; // because of %s
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// binary search
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while (true) {
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property_size = (max_len + min_len) / 2;
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try (Session session = driver.session()) {
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String property_value = new String(new char[property_size])
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.replace('\0', 'a');
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String query = String.format(query_template, property_value);
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session.run(query).consume();
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if (min_len == max_len || property_size + 1 > max_len) {
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break;
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}
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min_len = property_size + 1;
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}
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catch (Exception e) {
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System.out.println(String.format(
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"Query length: %d; Error: %s",
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property_size + template_size, e));
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max_len = property_size - 1;
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}
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}
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// final result
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System.out.println(
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String.format("\nThe max length of a query executed from " +
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"Java driver is: %s\n",
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property_size + template_size));
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// cleanup
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driver.close();
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}
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}
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