### 3. Backup Existing System

Before migration:

1. Export current search configurations
2. Backup existing indices and data
3. Document custom integrations and API endpoints
4. Save user access control settings

---

## Migration Methods

### Google Search Appliance (GSA) / Google Mini

Fess provides comprehensive GSA migration support through configuration import and API compatibility.

        suggester.createIndexIfNothing();
        Thread.sleep(100);

        // Verify initial state - should have one index
        GetAliasesResponse aliasResponse = client.admin().indices().prepareGetAliases(suggester.getIndex()).execute().actionGet();
        assertTrue("Should have at least one index initially", aliasResponse.getAliases().size() >= 1);

        // Create next index - this is the main method we're testing

        final String encoded = Base64Util.encode(singleByte);
        assertNotNull("Encoded result should not be null", encoded);
        final byte[] decoded = Base64Util.decode(encoded);
        assertEquals("Decoded should have same length", 1, decoded.length);
        assertEquals("Decoded byte should match", singleByte[0], decoded[0]);
    }

    /**
     * Test encode with two bytes
     *
     * @throws Exception
     */

package org.codelibs.fess.exception;

import org.codelibs.fess.app.web.RootAction;

/**
 * Exception thrown when user role authentication fails during login attempts.
 * This exception is used to indicate that a user does not have the required role
 * to access a specific action or resource.
 *
 */
public class UserRoleLoginException extends RuntimeException {

    private static final long serialVersionUID = 1L;

    }

    /**
     * Gets a list of access results for the specified URL.
     *
     * @param url the URL
     * @param hasData whether the result should have data
     * @return the list of access results
     */
    @Override
    public List<AccessResultImpl<Long>> getAccessResultList(final String url, final boolean hasData) {

REM Causes the JVM to dump its heap on OutOfMemory.
REM set FESS_JAVA_OPTS=%FESS_JAVA_OPTS% -XX:+HeapDumpOnOutOfMemoryError
REM The path to the heap dump location, note directory must exists and have enough
REM space for a full heap dump.
REM FESS_JAVA_OPTS=%FESS_JAVA_OPTS% -XX:HeapDumpPath=%FESS_HOME%/logs/heapdump.hprof

REM Disables explicit GC
set FESS_JAVA_OPTS=%FESS_JAVA_OPTS% -XX:+DisableExplicitGC

                    // Try to parse as Disallow directive
                    value = getValue(DISALLOW_RECORD, line);
                    if (value != null) {
                        // Only process if we have a current user-agent and value is not empty
                        if (!currentDirectiveList.isEmpty() && value.length() > 0) {
                            for (final Directive directive : currentDirectiveList) {

        return Objects.hash(Arrays.hashCode(inputs), output);
    }

    /**
     * Compares this CharMappingItem with another object for equality.
     * Two CharMappingItem objects are equal if they have the same inputs and output.
     * Note: inputs arrays are sorted in the constructor, so no sorting is needed here.
     *
     * @param obj the object to compare with

        // All should complete without error and without modification
        processor.process(data1);
        processor.process(data2);
        processor.process(data3);

        // data3 should still have its original values
        assertEquals("https://example.com", data3.getUrl());
        assertEquals(404, data3.getHttpStatusCode());
    }

    public void test_threadSafety() {

    public Long minDocCount;

    /** Sort order for facet values (e.g., "count.desc", "term.asc") */
    public String sort;

    /** Value to use for documents that don't have the facet field */
    public String missing;

    /**
     * Default constructor for FacetInfo.
     */
    public FacetInfo() {
        // Default constructor
    }

    /**