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Merge pull request #433 from vinamogit/fix-npe-toomanyrequests
Avoid to have unexpected exception on status code 429 TooManyRequests
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14 changes: 9 additions & 5 deletions
14
src/main/java/org/stellar/sdk/requests/TooManyRequestsException.java
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Original file line number | Diff line number | Diff line change |
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@@ -1,21 +1,25 @@ | ||
package org.stellar.sdk.requests; | ||
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import com.google.common.base.Optional; | ||
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/** | ||
* Exception thrown when too many requests were sent to the Horizon server. | ||
* @see <a href="https://developers.stellar.org/api/introduction/rate-limiting/" target="_blank">Rate Limiting</a> | ||
*/ | ||
public class TooManyRequestsException extends RuntimeException { | ||
private int retryAfter; | ||
private Integer retryAfter; | ||
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public TooManyRequestsException(int retryAfter) { | ||
public TooManyRequestsException(Integer retryAfter) { | ||
super("The rate limit for the requesting IP address is over its alloted limit."); | ||
this.retryAfter = retryAfter; | ||
} | ||
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/** | ||
* Returns number of seconds a client should wait before sending requests again. | ||
* Returns number of seconds a client should wait before sending requests again, | ||
* or -1 this time is unknown. | ||
*/ | ||
public int getRetryAfter() { | ||
return retryAfter; | ||
public Optional<Integer> getRetryAfter() { | ||
return Optional.fromNullable(retryAfter); | ||
} | ||
} |
66 changes: 66 additions & 0 deletions
66
src/test/java/org/stellar/sdk/requests/ResponseHandlerTest.java
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@@ -0,0 +1,66 @@ | ||
package org.stellar.sdk.requests; | ||
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import static org.junit.Assert.assertEquals; | ||
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import java.io.IOException; | ||
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import com.google.common.base.Optional; | ||
import org.junit.Assert; | ||
import org.junit.Test; | ||
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import okhttp3.OkHttpClient; | ||
import okhttp3.mockwebserver.MockResponse; | ||
import okhttp3.mockwebserver.MockWebServer; | ||
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public class ResponseHandlerTest { | ||
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@Test | ||
public void testTooManyRequests() throws IOException, InterruptedException { | ||
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MockResponse response = new MockResponse(); | ||
response.setResponseCode(429); | ||
response.setHeader("Retry-After", "10"); | ||
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MockWebServer mockWebServer = new MockWebServer(); | ||
mockWebServer.start(); | ||
mockWebServer.enqueue(response); | ||
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OkHttpClient okHttpClient = new OkHttpClient().newBuilder().build(); | ||
try { | ||
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AccountsRequestBuilder.execute(okHttpClient, mockWebServer.url("/")); | ||
Assert.fail(); | ||
} catch (TooManyRequestsException tmre) { | ||
assertEquals(Optional.of(10), tmre.getRetryAfter()); | ||
} finally { | ||
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mockWebServer.shutdown(); | ||
mockWebServer.close(); | ||
} | ||
} | ||
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@Test | ||
public void testTooManyRequestsNoHeader() throws IOException, InterruptedException { | ||
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MockResponse response = new MockResponse(); | ||
response.setResponseCode(429); | ||
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MockWebServer mockWebServer = new MockWebServer(); | ||
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mockWebServer.start(); | ||
mockWebServer.enqueue(response); | ||
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OkHttpClient okHttpClient = new OkHttpClient().newBuilder().build(); | ||
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try { | ||
AccountsRequestBuilder.execute(okHttpClient, mockWebServer.url("/")); | ||
Assert.fail(); | ||
} catch (TooManyRequestsException tmre) { | ||
assertEquals(Optional.absent(), tmre.getRetryAfter()); | ||
} finally { | ||
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mockWebServer.shutdown(); | ||
mockWebServer.close(); | ||
} | ||
} | ||
} |